Numbers k such that k-1 is a perfect square and k+1 is prime.

Terms

a(0) =1a(1) =2a(2) =10a(3) =82a(4) =226a(5) =442a(6) =1090a(7) =1522a(8) =2026a(9) =3250a(10) =6562a(11) =9802a(12) =11026a(13) =12322a(14) =13690a(15) =15130a(16) =21610a(17) =29242a(18) =47962a(19) =50626a(20) =56170a(21) =59050a(22) =62002a(23) =65026a(24) =74530a(25) =88210a(26) =91810a(27) =95482a(28) =103042a(29) =119026