A248790 - OEIS

A248790

Numbers n with the property that p = n^2 - 11 and q = n^2 + 11 are consecutive primes.

510, 720, 1200, 2190, 4350, 4980, 5040, 5250, 5670, 6810, 8280, 8490, 9150, 10140, 10650, 11430, 12510, 13800, 13980, 14160, 14640, 14700, 14820, 15000, 15750, 16890, 17220, 18180, 18270, 18750, 19110, 20940, 21270, 22050, 24000, 24570, 24720, 24990, 25620, 25920, 26520

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OFFSET

1,1

COMMENTS

All terms are == 0 (mod 30).

LINKS

Zak Seidov, Table of n, a(n) for n = 1..1000

EXAMPLE

n=510, p=260089=prime(22845), q=260111=prime(22846).

PROG

(PARI) isok(n) = isprime(p=n^2-11) && isprime(q=n^2+11) && (q==nextprime(p+1)); \\ Michel Marcus, Oct 14 2014

CROSSREFS