A260806 Primes p such that p = q^2 - 6*r^2 where q and r are also primes.

67, 97, 139, 211, 307, 337, 379, 547, 643, 691, 787, 811, 907, 937, 1123, 1483, 1531, 1627, 1657, 1699, 1747, 1867, 1987, 2083, 2467, 2659, 2707, 3067, 3163, 3187, 3307, 3331, 3457, 3571, 3643, 3697, 4027, 4339, 4363, 4507, 4603, 4723, 4987, 5179, 5227, 5563

Offset

1,1

Links

Colin Barker, Table of n, a(n) for n = 1..1000

Example

67 is in the sequence because 67 = 11^2 - 6*3^2 and 67, 11 and 3 are all primes.

Crossrefs

Cf. A260805, A260807, A260808, A260809.

Sequence in context: A232634 A302345 A276307 * A180557 A127732 A071958

Adjacent sequences: A260803 A260804 A260805 * A260807 A260808 A260809

Keyword

nonn

Author

Colin Barker, Jul 31 2015

Status

approved