A160404 Numbers k such that 23*10^(k + 2) + 57 is prime.

0, 1, 3, 8, 21, 32, 33, 48, 68, 295, 296, 298, 1081, 1753, 1963, 4336, 5008, 5608, 14240

Offset

1,3

Links

Table of n, a(n) for n=1..19.

Mathematica

lst = {}; Do[ If[ PrimeQ[23*10^(n + 2) + 57], AppendTo[ lst, n]], {n, 0, 6000}]; lst (* Robert G. Wilson v, May 29 2009 *)

Crossrefs

Cf. A160403 (primes of the form 23*10^(k + 2) + 57).

Sequence in context: A334136 A046815 A203848 * A103736 A172243 A101332

Adjacent sequences: A160401 A160402 A160403 * A160405 A160406 A160407

Keyword

nonn,base,more

Author

Lekraj Beedassy, May 13 2009

Extensions

a(8)-a(18) from Robert G. Wilson v, May 29 2009

Name edited by Jinyuan Wang, Aug 10 2021

a(19) from Michael S. Branicky, Mar 10 2023

Status

approved