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

Author

Amarnath Murthy, Jul 08 2005

Keywords

• base
• nonn

Comments

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

Extensions

Corrected and extended by Giovanni Resta, Feb 07 2006