Numbers k such that k^2 + 1 is prime.

Terms

a(0) =1a(1) =2a(2) =4a(3) =6a(4) =10a(5) =14a(6) =16a(7) =20a(8) =24a(9) =26a(10) =36a(11) =40a(12) =54a(13) =56a(14) =66a(15) =74a(16) =84a(17) =90a(18) =94a(19) =110a(20) =116a(21) =120a(22) =124a(23) =126a(24) =130a(25) =134a(26) =146a(27) =150a(28) =156a(29) =160