Numbers k such that k^2 + k + 5 is prime.

Terms

a(0) =0a(1) =1a(2) =2a(3) =3a(4) =6a(5) =7a(6) =11a(7) =16a(8) =17a(9) =18a(10) =21a(11) =23a(12) =27a(13) =31a(14) =32a(15) =38a(16) =42a(17) =48a(18) =51a(19) =62a(20) =67a(21) =72a(22) =73a(23) =76a(24) =77a(25) =83a(26) =86a(27) =91a(28) =93a(29) =97