A049492 - OEIS

A049492

Primes p such that p+4 and p+16 are also primes.

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

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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 *)