A123990 Numbers k for which 16*k+1, 16*k+3, 16*k+7, 16*k+13 and 16*k+15 are primes.

1, 7771, 18166, 21691, 26146, 26356, 46801, 69046, 75916, 91516, 111406, 122716, 156196, 171436, 175726, 177316, 201571, 219316, 222706, 259951, 282826, 355531, 426796, 433621, 435301, 438976, 440056, 524371, 560461, 585166, 605506, 608026

Offset: 1

Author

Artur Jasinski, Oct 30 2006

Keywords

• nonn

Links

• Amiram Eldar, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A092022.

Programs

Mathematica

Select[Range[10^6], And @@ PrimeQ /@ ({1, 3, 7, 13, 15} + 16#) &] (* Ray Chandler, Dec 06 2006 *)