Base-2 Fermat pseudoprimes k such that the multiplicative order of 2 modulo k is odd.

Terms

a(0) =2047a(1) =4681a(2) =15841a(3) =42799a(4) =52633a(5) =90751a(6) =220729a(7) =256999a(8) =271951a(9) =486737a(10) =514447a(11) =647089a(12) =741751a(13) =916327a(14) =1082401a(15) =1145257a(16) =1730977a(17) =1969417a(18) =2205967a(19) =2304167a(20) =2748023a(21) =2811271a(22) =2953711a(23) =2976487a(24) =3567481a(25) =4188889a(26) =4469471a(27) =4835209a(28) =4863127a(29) =5016191