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 A049492 Primes p such that p+4 and p+16 are also primes. 15
 3, 7, 13, 37, 43, 67, 97, 163, 223, 277, 463, 487, 643, 757, 823, 937, 967, 1087, 1093, 1213, 1303, 1423, 1483, 1567, 1597, 1693, 1873, 2083, 2137, 2293, 2377, 2617, 2683, 2953, 3187, 3343, 3847, 3907, 4003, 4447, 4783, 5503, 5653, 5923, 6547, 6967, 6997 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS All terms > 3 are == 1 (mod 6). - Zak Seidov, Sep 05 2014 Intersection of A023200 and A049488. - Michel Marcus, Sep 05 2014 LINKS Zak Seidov, Table of n, a(n) for n = 1..1000 EXAMPLE 3, 3+4 = 7, 3+16 = 19 are all primes. MATHEMATICA Select[Prime[Range[900]], And@@PrimeQ[#+{4, 16}]&] (* Harvey P. Dale, Jan 17 2011 *) PROG (PARI) lista(nn) = forprime (n=1, nn, if (isprime(n+4) && isprime(n+16), print1(n, ", "))); \\ Michel Marcus, Sep 05 2014 CROSSREFS Cf. A023200, A049488, A049493. Sequence in context: A106952 A106951 A106057 * A166283 A350676 A186721 Adjacent sequences: A049489 A049490 A049491 * A049493 A049494 A049495 KEYWORD nonn AUTHOR Labos Elemer STATUS approved

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Last modified December 7 01:11 EST 2023. Contains 367616 sequences. (Running on oeis4.)