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A145487 Numbers k such that 6k+5 is prime and 12k+5 is also prime 2
0, 1, 2, 3, 4, 7, 8, 9, 11, 14, 16, 21, 22, 24, 29, 32, 37, 38, 42, 43, 46, 51, 58, 63, 64, 66, 71, 73, 77, 79, 81, 84, 92, 98, 99, 102, 106, 107, 108, 113, 119, 123, 134, 136, 142, 143, 156, 157, 158, 162, 184, 191, 196, 198, 203, 212, 217, 219, 227, 228, 238, 241, 246 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Ivan Neretin, Table of n, a(n) for n = 1..10000

FORMULA

a(n) = (A145471(n)-5)/12.

MATHEMATICA

aa = {}; k = 5; Do[If[PrimeQ[(k + Prime[n])/2], AppendTo[aa, (Prime[n] - 5)/12]], {n, 1, 500}]; aa

Select[Range[0, 250], PrimeQ[6 # + 5] && PrimeQ[12 # + 5] &] (* Ivan Neretin, Jan 21 2017 *)

CROSSREFS

Cf. A063908-A063913, A092109, A145471-A145490.

Sequence in context: A022162 A022164 A074215 * A061856 A105941 A276876

Adjacent sequences:  A145484 A145485 A145486 * A145488 A145489 A145490

KEYWORD

nonn

AUTHOR

Artur Jasinski, Oct 11 2008

STATUS

approved

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Last modified January 23 13:54 EST 2022. Contains 350511 sequences. (Running on oeis4.)