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A124519
Numbers k such that 12*k - 1 and 12*k + 1 are twin primes.
13
1, 5, 6, 9, 15, 16, 19, 20, 26, 29, 35, 36, 50, 55, 69, 85, 86, 91, 96, 110, 119, 121, 124, 134, 135, 139, 149, 156, 161, 169, 174, 176, 189, 195, 216, 224, 226, 250, 260, 264, 271, 275, 280, 281, 289, 294, 295, 306, 314, 321, 335, 341, 344, 355, 356, 379, 399
OFFSET
1,2
LINKS
EXAMPLE
1 is in the sequence since 12*1 - 1 = 11 and 12*1 + 1 = 13 are twin primes.
MATHEMATICA
Select[Range[400], And @@ PrimeQ[{-1, 1} + 12# ] &] (* Ray Chandler, Nov 16 2006 *)
KEYWORD
nonn
AUTHOR
Artur Jasinski, Nov 04 2006
EXTENSIONS
Extended by Ray Chandler, Nov 16 2006
STATUS
approved