Composite numbers k == 3 (mod 4) such that (1 + i)^k == 1 - i (mod k), where i = sqrt(-1).

Terms

a(0) =2047a(1) =42799a(2) =90751a(3) =256999a(4) =271951a(5) =476971a(6) =514447a(7) =741751a(8) =877099a(9) =916327a(10) =1302451a(11) =1325843a(12) =1397419a(13) =1441091a(14) =1507963a(15) =1530787a(16) =1907851a(17) =2004403a(18) =2205967a(19) =2304167a(20) =2748023a(21) =2811271a(22) =2953711a(23) =2976487a(24) =3090091a(25) =3116107a(26) =4469471a(27) =4863127a(28) =5016191