A108856 Numbers n such that 10*n - 131 is prime.

15, 16, 19, 21, 22, 24, 27, 28, 31, 33, 36, 37, 40, 48, 49, 51, 52, 54, 55, 57, 58, 61, 63, 64, 70, 73, 75, 79, 84, 85, 87, 90, 94, 96, 97, 99, 105, 106, 114, 115, 117, 118, 120, 124, 126, 136, 138, 139, 141, 142, 145, 153, 154, 156, 157, 159, 162, 163, 168, 169, 171

Offset

1,1

Links

Table of n, a(n) for n=1..61.

Example

If n=15 then 10*n - 131 = 19 (prime).
If n=49 then 10*n - 131 = 359 (prime).

Mathematica

Select[Range[14, 200], PrimeQ[10#-131]&] (* Harvey P. Dale, Aug 08 2021 *)

Prog

(Magma) [n: n in [14..200] | IsPrime(10*n-131)]; - Vincenzo Librandi, Nov 13 2010
(PARI) is(n)=isprime(10*n-131) \\ Charles R Greathouse IV, Jun 13 2017

Crossrefs

Sequence in context: A354626 A114841 A031168 * A241750 A039689 A332515

Adjacent sequences: A108853 A108854 A108855 * A108857 A108858 A108859

Keyword

nonn,easy

Author

Parthasarathy Nambi, Jul 11 2005

Status

approved