A113575 Least (2n-1)-digit palindromic prime == 1 (mod n), or 0 if no such prime exists.

2, 101, 10501, 1003001, 100030001, 10000500001, 1000024200001, 100000323000001, 10000005750000001, 1000000008000000001, 100000005484500000001, 10000000004640000000001, 1000000001102011000000001, 100000000000131000000000001, 10000000000003830000000000001

Offset

1,1

Comments

Conjecture: No term is zero.

Links

Table of n, a(n) for n=1..15.

Example

a(4) = 1003001 == 1 mod 4.

Crossrefs

Cf. A113576.

Sequence in context: A035325 A266457 A028989 * A173640 A111012 A256516

Adjacent sequences: A113572 A113573 A113574 * A113576 A113577 A113578

Keyword

base,nonn

Author

Amarnath Murthy, Nov 06 2005

Extensions

More terms from R. J. Mathar, Aug 28 2007

Status

approved