Numbers k such that (k^2 + 1)/10 is prime.

Terms

a(0) =7a(1) =13a(2) =17a(3) =23a(4) =27a(5) =33a(6) =37a(7) =53a(8) =63a(9) =67a(10) =77a(11) =87a(12) =97a(13) =103a(14) =113a(15) =127a(16) =137a(17) =147a(18) =153a(19) =163a(20) =167a(21) =197a(22) =223a(23) =227a(24) =247a(25) =263a(26) =267a(27) =277a(28) =283a(29) =287