A109864 Least palindromic prime beginning with n, or 0 if no such prime exists.

11, 2, 3, 0, 5, 0, 7, 0, 919, 101, 11, 12421, 131, 14341, 151, 16061, 17471, 181, 191, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 30103, 313, 32323, 33533, 34543, 353, 36263, 373, 383, 39293, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0

Offset

1,1

Comments

Conjecture: a(n) = 0 if and only if n > 3 and n begins with 2,4,6,8 or 5 (most significant digit).

Links

Table of n, a(n) for n=1..69.

Crossrefs

Sequence in context: A040118 A099268 A070277 * A231433 A240454 A099756

Adjacent sequences: A109861 A109862 A109863 * A109865 A109866 A109867

Keyword

base,nonn

Author

Amarnath Murthy, Jul 08 2005

Extensions

Corrected and extended by Giovanni Resta, Feb 07 2006

Status

approved