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A173230 Primes p of the form 6k+1 such that 6p+1 is also prime. 0
7, 13, 37, 61, 73, 103, 151, 181, 241, 271, 277, 283, 313, 331, 367, 373, 397, 577, 601, 607, 661, 727, 751, 787, 853, 907, 937, 1033, 1063, 1117, 1171, 1201, 1321, 1327, 1381, 1423, 1453, 1531, 1567, 1693, 1777, 1831, 1873, 1987, 1993, 2137, 2161, 2203, 2221, 2281, 2287, 2293, 2347, 2551, 2593, 2677, 2767, 2791, 2851, 2971, 3037, 3061, 3163, 3181, 3307, 3391 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..66.

MATHEMATICA

sp1Q[n_]:=IntegerQ[(n-1)/6]&&PrimeQ[6n+1]; Select[Prime[Range[500]], sp1Q] (* Harvey P. Dale, Apr 08 2018 *)

PROG

(MAGMA) [ p: n in [0..600] | IsPrime(6*p+1) and IsPrime(p) where p is 6*n+1 ];

CROSSREFS

Subsequence of A007693 which in turn is subsequence of A024899.

Sequence in context: A307762 A290947 A267985 * A155036 A088985 A022005

Adjacent sequences:  A173227 A173228 A173229 * A173231 A173232 A173233

KEYWORD

nonn

AUTHOR

Zak Seidov, Nov 22 2010

STATUS

approved

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Last modified July 29 01:22 EDT 2021. Contains 346340 sequences. (Running on oeis4.)