A069176 Numbers n such that n-1, n+1, 2n-1, 2n+1, 4n-1, 4n+1, 8n-1 and 8n+1 are all prime.

253680, 1138830, 58680930, 90895770, 124253010, 269877300, 392071680, 613813200, 1014342210, 1277981670, 1413015030, 1453978680, 1753585680, 2919331380, 3424037190, 3538972710, 4025789040, 4175762010, 4362439200

Offset: 1

Author

Don Reble, Apr 09 2002

Keywords

• nonn

Comments

For one such number, 41887255410, even 16n-1 and 16n+1 are primes.

Examples

			253680 is there because 253679, 253681, 507359, 507361, 1014719, 1014721, 2029439 and 2029441 are all prime.
		

Crossrefs

Cf. A118860. Subset of A069175.