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Full list of Palindromic Triangulars
rood The Subsets rood Factorization rood comments

In the table below you'll find a compilation of all the palindromic triangular numbers I found so far.
If the basenumber is palindromic or prime you'll see these numbers displayed with a lighter background
namely bisque color. Furthermore :
Sidecells in oldlace color designate the palindromic basenumbers
Sidecells in lightgreen color designate the prime basenumbers

My search program reached the  basenumber  1,414,213,562,373,095,048,802 [ May 31, 2004 ]
From length 43 Feng Yuan took over.

Index Nr Info BasenumberLength
Palindromic Triangular NumberLength
    
 
147 Info 128.184.152.897.963.669.861.55224
8.215.588.527.084.263.951.180.440.811.593.624.807.258.855.12846
146 Info 115.945.380.367.510.626.966.64824
6.721.665.614.283.359.365.218.338.125.639.533.824.165.661.27646
145 Info 114.860.741.505.066.911.342.29624
6.596.494.969.546.900.318.903.773.098.130.096.459.694.946.95646
144 Info 26.539.182.748.774.333.465.49723
352.164.110.486.420.593.101.030.101.395.024.684.011.461.25345
143 Info 5.805.651.147.054.009.150.04122
16.852.792.620.644.766.088.388.388.066.744.602.629.725.86144
142 Info 3.630.238.456.595.636.157.72822
6.589.315.625.872.933.253.747.473.523.392.785.265.139.85643
141 Info 3.261.059.106.801.402.665.75422
5.317.253.249.026.181.079.052.509.701.816.209.423.527.13543
140 Info 775.781.766.082.836.455.60221
300.918.674.293.302.389.819.918.983.203.392.476.819.00342
139 Info 585.863.634.063.453.017.10621
171.618.098.859.017.793.192.291.397.710.958.890.816.17142
138 Info 333.741.662.509.416.495.21021
55.691.748.647.274.629.891.519.892.647.274.684.719.65541
137
H59		 Info 333.470.345.690.102.634.08521
55.601.235.727.338.276.212.021.267.283.372.753.210.65541
136
H58		 Info 191.600.462.227.318.472.12121
18.355.368.562.861.046.305.450.364.016.826.586.355.38141
135
H57		 Info 35.369.824.079.822.102.85120
625.512.227.718.781.732.353.237.187.817.722.215.52639
134 Info 32.637.734.114.649.927.57020
532.610.844.069.291.845.737.548.192.960.448.016.23539
133
H56		 Info 19.123.354.745.855.372.72120
182.851.348.367.914.603.505.306.419.763.843.158.28139
132 Info 16.175.904.024.612.952.34620
130.829.935.506.744.754.616.457.447.605.539.928.03139
131 Info 11.665.833.272.979.576.31620
68.045.832.976.478.686.977.968.687.467.923.854.08638
130
H55		 Info 3.654.345.456.545.434.56319
6.677.120.357.887.130.286.820.317.887.530.217.76637
129 Info 3.652.242.206.567.626.03619
6.669.436.567.716.980.985.890.896.177.656.349.66637
128 Info 3.637.582.781.740.258.58819
6.616.004.247.006.598.875.788.956.007.424.006.16637
127 Info 3.405.603.489.389.985.67419
5.799.067.563.472.623.134.313.262.743.657.609.97537
126
H54		 Info 3.333.229.904.907.177.88519
5.555.210.799.483.757.064.607.573.849.970.125.55537
125 Info 3.271.889.143.987.456.17019
5.352.629.285.271.484.348.434.841.725.829.262.53537
124 Info 3.237.532.871.306.389.77419
5.240.809.546.394.698.286.828.964.936.459.080.42537
123 Info 2.672.899.778.869.085.02219
3.572.196.613.939.201.806.081.029.393.166.912.75337
122 Info 2.470.152.923.949.718.92219
3.050.827.733.848.672.937.392.768.483.377.280.50337
121
H53		 Info 1.935.755.375.665.009.72119
1.873.574.437.207.991.455.541.997.027.344.753.78137
120 Info 775.527.779.120.670.32218
300.721.668.093.919.607.706.919.390.866.127.00336
119 Info 352.465.914.177.746.74818
62.116.110.328.577.368.186.377.582.301.161.12635
118 Info 352.449.681.516.778.87618
62.110.389.000.639.430.803.493.600.098.301.12635
117
H52		 Info 247.184.344.095.525.79718
30.550.049.982.967.649.594.676.928.994.005.50335
116
H51		 Info 112.540.786.741.633.18318
6.332.714.340.212.879.669.782.120.434.172.33634
115
H50		 Info 109.113.947.229.482.90918
5.952.926.739.999.190.550.919.999.376.292.59534
114
H49		 Info 108.100.203.429.839.92918
5.842.826.990.786.388.228.836.870.996.282.48534
113
H48		 Info 78.358.935.395.500.83717
3.070.061.378.158.136.996.318.518.731.600.70334
112
H47		 Info 26.555.908.318.527.49717
352.608.133.311.018.969.810.113.331.806.25333
111 Info 10.686.132.500.837.47417
57.096.713.912.727.488.472.721.931.769.07532
110
H46		 Info 4.500.990.532.341.40116
10.129.457.886.113.466.431.168.875.492.10132
109 Info 4.062.262.265.478.59216
8.250.987.356.765.633.365.676.537.890.52831
108
H45		 Info 3.729.035.890.325.94316
6.952.854.335.669.501.059.665.334.582.59631
107
H44		 Info 3.249.909.720.631.02516
5.280.956.596.126.015.106.216.956.590.82531
106 Info 362.785.412.063.72815
65.806.627.603.124.642.130.672.660.85629
105
H43		 Info 353.520.620.692.92315
62.488.414.627.554.945.572.641.488.42629
104
H42		 Info 326.825.312.860.02915
53.407.392.563.028.082.036.529.370.43529
103 Info 173.008.538.941.23815
14.965.977.273.291.019.237.277.956.94129
102
H41		 Info 164.402.190.438.22115
13.514.040.110.442.624.401.104.041.53129
101 Info 109.237.730.189.29015
5.966.440.848.454.114.548.480.446.69528
100
H40		 Info 50.364.608.806.28114
1.268.296.910.104.884.010.196.928.62128
99 Info 41.801.907.377.57214
873.699.730.201.575.102.037.996.37827
98 Info 36.543.454.565.43614
667.712.035.788.060.887.530.217.76627
97 Info 26.515.516.477.98214
351.536.307.047.080.740.703.635.15327
96
H39		 Info 11.423.905.837.87114
65.252.812.296.277.269.221.825.25626
95 Info 10.865.723.925.03414
59.031.978.207.533.570.287.913.09526
94 Info 7.747.137.817.12213
30.009.072.178.744.787.127.090.00326
93 Info 5.052.120.436.31813
12.761.960.451.533.515.406.916.72126
92
H38		 Info 4.063.286.017.96713
8.255.146.631.905.091.366.415.52825
91 Info 2.466.444.446.64213
3.041.674.104.186.814.014.761.40325
90 Info 1.325.269.593.37213
878.169.747.558.855.747.961.87824
89 Info 529.670.494.28612
140.275.416.258.852.614.572.04124
88
H37		 Info 417.898.160.42712
87.319.436.244.344.263.491.37823
87
H36		 Info 405.270.333.72712
82.122.021.699.799.612.022.12823
86 Info 353.922.263.87612
62.630.484.433.733.448.403.62623
85
H35		 Info 352.469.793.25112
62.117.477.577.377.577.471.12623
84 Info 266.444.444.66212
35.496.321.045.754.012.369.45323
83 Info 246.644.446.64212
30.416.741.529.792.514.761.40323
82 Info 104.561.417.19012
5.466.544.982.442.894.456.64522
81 Info 62.747.896.73811
1.968.649.272.552.729.468.69122
80 Info 49.786.655.91811
1.239.355.553.773.555.539.32122
79 Info 36.657.342.04811
671.880.363.030.363.088.17621
78
H34		 Info 26.694.925.65711
356.309.527.929.725.903.65321
77 Info 26.644.444.66211
354.963.215.686.512.369.45321
76 Info 24.888.030.68211
309.707.035.626.530.707.90321
75
H33		 Info 17.527.740.90111
153.610.850.555.058.016.35121
74 Info 14.667.896.19811
107.573.589.444.985.375.70121
73 Info 11.151.642.87611
62.179.569.422.496.597.12620
72
H32		 Info Prime Curios!          5.513.600.77310
15.199.896.744.769.899.15120
71
H31		 Info 3.567.632.39110
6.364.000.440.440.004.63619
70 Info 2.664.444.66210
3.549.632.679.762.369.45319
69
H30		 Info 2.480.116.43710
3.075.488.771.778.845.70319
68
H29		 Info 1.014.708.80510
514.816.979.979.618.41518
67 Info 846.122.2229
357.961.407.704.169.75318
66
H28		 Info 368.505.7519
67.898.244.444.289.87617
65
H27		 Info 363.474.3639
66.056.806.460.865.06617
64
H26		 Info 341.127.3459
58.183.932.923.938.18517
63
H25		 Info 182.143.8419
16.588.189.498.188.56117
62 Info 149.721.0589
11.208.197.679.180.21117
61 Info 149.142.4589
11.121.736.463.712.11117
60 Info 128.127.0329
8.208.268.228.628.02816
59 Info 109.656.2289
6.012.244.224.422.10616
58 Info 59.009.8188
1.741.079.339.701.47116
57 Info 56.524.6988
1.597.520.770.257.95116
56
H24		 Info 50.008.8818
1.250.444.114.440.52116
55 Info 37.009.9168
684.866.959.668.48615
54 Info 36.979.1088
683.727.232.727.38615
53 Info 36.929.9088
681.909.070.909.18615
52 Info 36.545.4368
667.784.464.487.76615
51
H23		 Info 35.670.3918
636.188.414.881.63615
50
H22		 Info 34.705.1718
602.224.464.422.20615
49 Info 34.456.4348
593.622.939.226.39515
48 Info 33.062.9348
546.578.818.875.64515
47 Info 32.850.9708
539.593.131.395.93515
46 Info 31.643.9108
500.668.535.866.00515
45 Info 26.743.4228
357.605.323.506.75315
44 Info 15.126.2588
114.401.848.104.41115
43 Info 12.812.3928
82.078.700.787.02814
42 Info 11.631.0488
67.640.644.604.67614
41
H21		 Info 11.111.1118
61.728.399.382.71614
40 Info 6.307.9387
19.895.044.059.89114
39
H20		 Info 3.707.8837
6.874.200.024.78613
38 Info 3.457.6347
5.977.618.167.79513
37
H19		 Info 3.240.4257
5.250.178.710.52513
36
H18		 Info 1.620.6217
1.313.207.023.13113
35 Info 417.9726
87.350.505.37811
34 Info 365.4366
66.771.917.76611
33 Info 342.2706
58.574.547.58511
32 Info 337.6506
57.003.930.07511
31 Info 246.6426
30.416.261.40311
30 Info 179.1586
16.048.884.06111
29
H17		 Info 167.0536
13.953.435.93111
28
H16		 Info 111.1116
6.172.882.71610
27
H15		 Info 102.8496
5.289.009.82510
26 Info 57.1665
1.634.004.36110
25
H14		 Info 50.2815
1.264.114.62110
24 Info 18.9065
178.727.8719
23 Info 11.0885
61.477.4168
22 Info 8.3824
35.133.1538
21 Info 3.5484
6.295.9267
20
H13		 Info 3.3694
5.676.7657
19
H12		 Info 3.1854
5.073.7057
18 Info 2.6624
3.544.4537
17
H11		 Info 1.8334
1.680.8617
16
H10		 Info 1.5934
1.269.6217
15
H9		 Info 1.2874
828.8286
14
H8		 Info 1.1114
617.7166
13
H7		 Info 3633
66.0665
12
H6		 Info Prime!          1733
15.0515
11 Info 1323
8.7784
10
H5		 Info Prime!          1093
5.9954
9
H4		 Info 772
3.0034
8 Info 362
6663
7 Info 342
5953
6 Info 182
1713
5
H3		 Info Prime!          112
662
4 Info 102
552
3
H2		 Info Prime!          31
61
2 Info Prime!          21
31
1
H1		 Info 11
11
brown line
triangle tetra square cube circular palpri
brown line

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(All rights reserved) - Last modified : January 11, 2008.
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E-mail address : pdg@worldofnumbers.com