A262087 Largest palindrome p such that n-p is again a palindrome, or 0 if no such p exists.

0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 9, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 0, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 0, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 0, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 0, 55, 55, 55, 55, 55, 55, 55, 55, 55, 55, 0, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 0, 77, 77, 77, 77, 77, 77

Offset

0,3

Links

Markus Sigg, Table of n, a(n) for n = 0..10000

Formula

a(n) = 0 for n in {0} union A035137.

Prog

(PARI) a(N, P=A261423(N))=until(N<2*P=A261423(P-1), is_A002113(N-P)&&return(P))

Crossrefs

Cf. A261423, A002113, A035137.

Sequence in context: A017884 A072139 A266325 * A261914 A261423 A262040

Adjacent sequences: A262084 A262085 A262086 * A262088 A262089 A262090

Keyword

nonn,base

Author

M. F. Hasler, Sep 10 2015

Status

approved