A118420 Indices of Glaisher-primes: values n such that the concatenation of the first n decimal digits of the Glaisher-Kinkelin constant is prime.

7, 10, 18, 64, 71, 527, 1992, 5644, 8813, 19692

Offset

1,1

Links

Table of n, a(n) for n=1..10.

Eric Weisstein's World of Mathematics, Constant Primes

Eric Weisstein's World of Mathematics, Glaisher-Kinkelin Constant Digits

Eric Weisstein's World of Mathematics, Integer Sequence Primes

Example

A = 1.282427129100622636..., 1282427--the concatenation of the first 7 decimal digits--is prime, so a(1)=7.

Crossrefs

Cf. A074962, A118419.

Sequence in context: A124187 A328117 A155027 * A196939 A038211 A122226

Adjacent sequences: A118417 A118418 A118419 * A118421 A118422 A118423

Keyword

nonn,more,base

Author

Eric W. Weisstein, Apr 27 2006

Extensions

a(10) = 19692 from Eric W. Weisstein, Apr 29 2006

Edited by Charles R Greathouse IV, Apr 27 2010

Status

approved