A062767 Numbers k such that 3k+1, 3k+5 and 3k+7 are all prime.

2, 4, 12, 22, 32, 34, 64, 74, 92, 102, 152, 204, 274, 284, 292, 362, 432, 474, 482, 494, 554, 564, 594, 622, 624, 664, 694, 712, 792, 894, 902, 932, 1054, 1084, 1152, 1154, 1282, 1384, 1504, 1594, 1742, 1804, 1812, 1882, 1884, 1912, 2182, 2274, 2402, 2584

Offset

1,1

Links

Seiichi Manyama, Table of n, a(n) for n = 1..10000

Prog

(PARI) j=[]; for(n=1, 10000, if(isprime(3*n+1) && isprime(3*n+5) && isprime(3*n+7), j=concat(j, n))); j

Crossrefs

Sequence in context: A099603 A319615 A343865 * A173650 A303030 A291404

Adjacent sequences: A062764 A062765 A062766 * A062768 A062769 A062770

Keyword

nonn

Author

Jason Earls, Jul 17 2001

Status

approved