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A118327 Khinchin primes: values of n such that the concatenation of the first n decimal digits of Khinchin's constant is prime. 1
1, 407, 878, 4443, 4981, 6551, 13386, 28433 (list; graph; refs; listen; history; text; internal format)
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 A063145 A281859

Adjacent sequences:  A118324 A118325 A118326 * A118328 A118329 A118330

KEYWORD

nonn,base

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

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Last modified July 16 00:52 EDT 2019. Contains 325061 sequences. (Running on oeis4.)