A110746 a(n+1) is the least multiple of a(n) such that the digit reversal of the concatenation of the first n+1 terms is prime.

1, 1, 2, 4, 8, 136, 272, 1360, 14960, 254320, 6103680, 30518400, 335702400, 8056857600, 499525171200, 63439696742400, 1649432115302400, 94017630572236800, 5923110726050918400, 1528162567321136947200, 385096966964926510694400, 93963659939442068609433600

Offset

1,3

Links

Table of n, a(n) for n=1..22.

Example

11, 211, 4211, 84211, 63184211 are all primes.

Crossrefs

Cf. A110747.

Sequence in context: A286523 A060815 A200758 * A084010 A203630 A265595

Adjacent sequences: A110743 A110744 A110745 * A110747 A110748 A110749

Keyword

base,nonn,less

Author

Amarnath Murthy, Aug 10 2005

Extensions

Clarified definition and extended. - David Wasserman, Dec 16 2008

Status

approved