Odd integers k such that 2^((k-1)/2) == 1 (mod k*(k-2)).

Terms

a(0) =17a(1) =257a(2) =457a(3) =1297a(4) =6481a(5) =11953a(6) =26321a(7) =47521a(8) =47881a(9) =49681a(10) =65537a(11) =74449a(12) =157081a(13) =165601a(14) =278497a(15) =333433a(16) =476737a(17) =557041a(18) =560737a(19) =576721a(20) =1033057a(21) =1266841a(22) =1329337a(23) =1463617a(24) =1468897a(25) =2291041a(26) =2422201a(27) =2754481a(28) =2851633a(29) =2969137