A108857 Numbers n such that 10*n + 131 is prime.

0, 2, 5, 6, 8, 11, 12, 14, 15, 18, 20, 27, 29, 30, 33, 36, 39, 41, 44, 47, 50, 51, 53, 56, 57, 62, 63, 68, 69, 75, 78, 81, 84, 86, 89, 90, 92, 93, 96, 102, 104, 105, 107, 110, 116, 117, 119, 123, 125, 132, 134, 135, 138, 140, 144, 147, 149, 159, 161, 167, 168, 170, 173

Offset: 1

Author

Parthasarathy Nambi, Jul 11 2005

Keywords

• nonn
• easy

Examples

			If n=0 then 10*n + 131 = 131 (prime).
If n=33 then 10*n + 131 = 461 (prime).
		

Links

• Matthew House, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A024912.

Programs

Magma

[n: n in [0..200] | IsPrime(10*n+131)]; // Vincenzo Librandi, Nov 13 2010

Maple

select(n -> isprime(10*n+131), [$0..1000]); # Robert Israel, Aug 09 2015

Mathematica

Select[Range[0,200],PrimeQ[10#+131]&] (* Harvey P. Dale, Aug 13 2023 *)

PARI

is(n)=isprime(10*n+131) \\ Charles R Greathouse IV, Jun 12 2017

Formula

a(n) = A024912(n+6) - 13. - Robert Israel, Aug 09 2015