A119334 Indices of Apery-primes: numbers n such that the concatenation of the first n decimal digits of Apery's constant zeta(3) is prime.

10, 55, 109, 141

Offset: 1

Author

Eric W. Weisstein, May 14 2006

Keywords

• nonn
• more
• base

Comments

No additional terms up to 10000. - Harvey P. Dale, Aug 28 2019

Examples

			zeta(3) = 1.2020569031595..., 1202056903--the concatenation of the first 10 decimal digits--is prime, so a(1)=10.
		

Links

• Eric Weisstein's World of Mathematics, Apery-Prime
• Eric Weisstein's World of Mathematics, Integer Sequence Primes

Crossrefs

Cf. A002117, A119333.

Programs

Mathematica

Module[{nn=10000,z},z=RealDigits[Zeta[3],10,nn][[1]];Select[Range[nn],PrimeQ[FromDigits[Take[z,#]]]&]] (* Harvey P. Dale, Aug 28 2019 *)

Extensions

Edited by Charles R Greathouse IV, Apr 27 2010