A118327 Khinchin primes: values of n such that the concatenation of the first n decimal digits of Khinchin's constant is prime.

1, 407, 878, 4443, 4981, 6551, 13386, 28433

Offset

1,2

Links

Table of n, a(n) for n=1..8.

Eric Weisstein's World of Mathematics, Constant Primes

Eric Weisstein's World of Mathematics, Khinchin's Constant Digits

Eric Weisstein's World of Mathematics, Integer Sequence Primes

Example

K = 2.685..., 2--the concatenation of the first 1 decimal digits--is prime, so a(1)=1

Crossrefs

Cf. A002210.

Sequence in context: A172891 A172921 A063138 * A213606 A343157 A063145

Adjacent sequences: A118324 A118325 A118326 * A118328 A118329 A118330

Keyword

nonn,base,changed

Author

Eric W. Weisstein, Apr 24 2006; corrected Apr 26 2006

Extensions

More terms from Eric W. Weisstein, Apr 28 2006

a(8) = 28433 from Eric W. Weisstein, Apr 27 2006

Status

approved