Numbers k such that 2^(2^k-2) == 1 (mod k^2) and 2^(k-1) =/= 1 (mod k).

Terms

a(0) =66709a(1) =951481a(2) =2215441a(3) =2847421a(4) =4111381a(5) =4869757a(6) =28758601a(7) =81844921a(8) =124187581a(9) =300510001a(10) =306197821a(11) =1221936841a(12) =9763146541a(13) =10370479321a(14) =13560714361a(15) =14387344201a(16) =16287076081a(17) =16956342901a(18) =18820810297a(19) =19245374461a(20) =22732640101a(21) =26946809137a(22) =27119213281a(23) =29217386881