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Pa!indromic Sums of the first n 'type of numbers'

1. Sum of the first n primes is palindromic
2. Sum of the first n odd primes is palindromic
3. Sum of the first n composites is palindromic
4. Sum of the first n odd composites is palindromic
5. Sum of the first n even composites is palindromic
6. Sum of the first n palindromes is palindromic
7. Sum of the first n numbers is palindromic
8. Sum of the first n odd numbers is palindromic
9. Sum of the first n even numbers is palindromic

Sum of the first n primes is palindromic.

Sequence = 2 + 3 + 5 + 7 + 11 + 13 + ... + z
Index entries in OEIS A038582, A038584 and A038583
Other sources : Puzzle 7

Sum of the first n odd primes is palindromic.

Sequence = 3 + 5 + 7 + 11 + 13 + 17 + ... + z
Index entries in OEIS A058845, A058846 and A058847

Sum of the first n composites is palindromic.

Sequence = 4 + 6 + 8 + 9 + 10 + 12 + ... + z
Index entries in OEIS A053779, A057959 and A053780
Other sources : Puzzle 89

Sum of the first n odd composites is palindromic.

Sequence = 9 + 15 + 21 + 25 + 27 + 33 + ... + z
Index entries in OEIS A058848, A058849 and A058850
Other sources : Puzzle 89

Sum of the first n even composites is palindromic.

Sequence = 4 + 6 + 8 + 10 + 12 + 14 + ... + z
Index entries in OEIS A028553, A058851 and A028554

Sum of the first n palindromes is palindromic.

Sequence = 1 + 2 + 3 + 4 + 5 + 6 + ... + z

Sum of the first n numbers is palindromic.

Sequence = 1 + 2 + 3 + 4 + 5 + 6 + ... + z
Main source see Palindromic Triangulars

Sum of the first n odd numbers is palindromic.

Sequence = 1 + 3 + 5 + 7 + 9 + 11 + ... + z
Main source see Palindromic Squares

Sum of the first n even numbers is palindromic.

Sequence = 2 + 4 + 6 + 8 + 10 + 12 + ... + z
Main source see Palindromic Pronic Numbers

Enoch Haga (email) from California, USA.

Jeff Heleen (email) from New Hampshire, USA.

G. L. Honaker, Jr. (email) from Bristol, Virginia, USA.

Jud McCranie (email) from USA.

Carlos Rivera (email) from Monterrey, Nuevo León, México.

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E-mail address : pdg@worldofnumbers.com

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