A113576 Least (2n-1)-digit palindromic prime == 1 (mod 2n-1), or 0 if no such prime exists.

2, 151, 10301, 1008001, 100161001, 10002520001, 1000605060001, 100000323000001, 10000007070000001, 1000000310130000001, 100000000212000000001, 10000000001710000000001, 1000000000016100000000001, 100000000000656000000000001, 10000000000004740000000000001

Offset

1,1

Comments

Conjecture: No term is zero.

Links

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

Example

a(3) = 10301 == 1 mod 5.

Crossrefs

Cf. A113575.

Sequence in context: A046473 A261967 A024245 * A102458 A206309 A265880

Adjacent sequences: A113573 A113574 A113575 * A113577 A113578 A113579

Keyword

base,easy,nonn

Author

Amarnath Murthy, Nov 06 2005

Extensions

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

Status

approved