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Palindromic Polygonal Sporadic Number Record Table

General formula for n-gonal is x/2[(n–2)x–(n–4)]

Feng Yuan
January 6, 2008
TRIANGLE3-gonalbase = 12818415289796366986155224
palindrome821558852708426395118044081159362480725885512846
Feng Yuan
January 21, 2008
SQUARE4-gonalbase = 137351253064925863529247760928
palindrome1886536671850530641991373196913731991460350581766356881 55
Feng Yuan
January 6, 2008
PENTA5-gonalbase = 12848111191876174826390824
palindrome2476109417982207324993232399423702289714901674247
Feng Yuan
January 5, 2008
HEXA6-gonalbase = 1326959137438716673274923
palindrome35216411048642059310103010139502468401146125345
Feng Yuan
January 6, 2008
HEPTA7-gonalbase = 11509537560444623434599324
palindrome3311736371382139346033767330643931283173637113347
Feng Yuan
January 3, 2008
OCTA8-gonalbase = 79035091439605146377121
palindrome187396370366002400676367600420066307369378143
Feng Yuan
January 6, 2008
NONA9-gonalbase = 11525423053487170954107224
palindrome4649238179664874022488616884220478466971832946447


Various Palindromic Sporadic Numbers Record Table


W. Roonguthai
August 31, 1997
PRONICn(n+1)base = 25545544554455445544554455455230
palindrome6525748465836682678168806984666489608861876286638564847525659
Feng Yuan
January 15, 2008
Q-PRONICn(n+2)base = 17995205539250987720198124
palindrome3238274223998894317465262564713498899322472832347
P. De Geest
-- -- --
TETRA(n)(n+1)(n+2)/6base = 3363
palindrome63787367
---
-- -- --
CUBEn^3base = 22014
palindrome1066252660111
Feng Yuan
January 24, 2008
QU-SQRn+(n+1)^2base = 30919949212710742030293824
palindrome9560432593166116359035505530953611661395234065947
Feng Yuan
January 19-25, 2008
QO-SQRn^2+(n+1)base = 186669018531236485060039325
palindrome348453224794151102660706360706620115149742235484349
Feng Yuan
January 25, 2008
SQUADD1n^2+1base = 27906017685891158114112624
palindrome7787458230852701074109090901470107258032854787747












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