Numbers k such that k^2 + k + 9 is prime.

Terms

a(0) =1a(1) =4a(2) =13a(3) =16a(4) =19a(5) =25a(6) =28a(7) =43a(8) =49a(9) =55a(10) =76a(11) =79a(12) =88a(13) =106a(14) =118a(15) =121a(16) =139a(17) =145a(18) =151a(19) =154a(20) =175a(21) =190a(22) =205a(23) =208a(24) =211a(25) =235a(26) =238a(27) =253a(28) =259a(29) =268