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A145489
Numbers k such that 6k + 11 is prime and 12k + 5 is also prime.
1
0, 1, 2, 3, 7, 8, 12, 16, 21, 23, 26, 37, 38, 42, 43, 47, 51, 56, 58, 63, 68, 73, 78, 91, 92, 98, 101, 106, 107, 108, 133, 136, 141, 142, 156, 157, 162, 173, 192, 196, 201, 203, 212, 218, 227, 233, 236, 238, 246, 247, 257, 267, 268, 271, 287, 296, 306, 313, 316, 323, 327, 332, 346, 353, 357, 366, 367, 371, 376, 387, 401, 406, 411, 423, 441, 442, 448, 453, 471, 472, 478, 483, 488, 491, 498
OFFSET
1,3
LINKS
FORMULA
a(n) = (A145475(n) - 5)/12.
MATHEMATICA
Select[Range[0, 500], PrimeQ[6# + 11 ] && PrimeQ[12# + 5]&]
PROG
(PARI) isok(n) = isprime(6*n+11) && isprime(12*n+5); \\ Michel Marcus, Jan 24 2017
CROSSREFS
KEYWORD
nonn
AUTHOR
Artur Jasinski, Oct 11 2008
EXTENSIONS
Corrected by Artur Jasinski, Apr 01 2011
STATUS
approved