Numbers k such that (k^2 + k + 1)/19 is prime.

Terms

a(0) =7a(1) =11a(2) =26a(3) =45a(4) =83a(5) =125a(6) =140a(7) =182a(8) =197a(9) =201a(10) =216a(11) =239a(12) =258a(13) =311a(14) =330a(15) =353a(16) =444a(17) =467a(18) =482a(19) =486a(20) =524a(21) =539a(22) =558a(23) =600a(24) =752a(25) =771a(26) =843a(27) =881a(28) =885a(29) =923