A068220 Twin primes belonging to packs of four or more twin pairs.

9419, 9421, 9431, 9433, 9437, 9439, 9461, 9463, 62969, 62971, 62981, 62983, 62987, 62989, 63029, 63031, 72221, 72223, 72227, 72229, 72251, 72253, 72269, 72271, 392261, 392263, 392267, 392269, 392279, 392281, 392297, 392299, 495569

Offset: 1

Author

Neil Fernandez, Mar 24 2002

Keywords

• nonn

Comments

A twin pack of primes contains 2 or more pairs of twin primes, between which pairs there are no other primes. 9419,9421,9431,9433,9437,9439,9461,9463 are in the sequence because they are consecutive primes which belong to more than 3 twin pairs. 137,139,149,151 are not because they belong to a pack of only 2 pairs.

Could be called unrestricted prime octets. - Harry J. Smith, Dec 16 2007

Crossrefs

Cf. A001097, A035792, A069457.

Extensions

More terms from Harry J. Smith, Dec 16 2007

Edited by N. J. A. Sloane, May 15 2008 at the suggestion of R. J. Mathar