Numbers k such that (4*k^2 + 1)/5 is prime.

Terms

a(0) =4a(1) =6a(2) =11a(3) =14a(4) =21a(5) =24a(6) =26a(7) =29a(8) =31a(9) =39a(10) =44a(11) =46a(12) =51a(13) =54a(14) =76a(15) =79a(16) =89a(17) =94a(18) =99a(19) =101a(20) =111a(21) =119a(22) =124a(23) =129a(24) =131a(25) =136a(26) =146a(27) =149a(28) =154a(29) =156