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A107960

Numbers n such that 11*n - 1 is prime.

4, 10, 12, 18, 22, 24, 28, 34, 40, 42, 52, 54, 60, 70, 78, 88, 94, 108, 112, 118, 120, 130, 132, 144, 148, 154, 160, 168, 174, 180, 190, 192, 202, 204, 208, 210, 222, 232, 238, 244, 250, 258, 264, 270, 280, 288, 300, 304, 322, 328, 334, 340, 342, 364, 372, 378

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

Harvey P. Dale, Table of n, a(n) for n = 1..1000

EXAMPLE

If n=4, then 11*n - 1 = 43 (prime).

If n=42, then 11*n - 1 = 461 (prime).

MATHEMATICA

Select[Range[400], PrimeQ[11#-1]&] (* Harvey P. Dale, Jul 18 2022 *)

PROG

(Magma) [n: n in [0..100000] | IsPrime(11*n - 1)]; // Vincenzo Librandi, Nov 13 2010