Numbers k such that 2^(k(k-1)) == 8 (mod k).

Terms

a(0) =28a(1) =292a(2) =553a(3) =5026a(4) =7519a(5) =20062a(6) =50888a(7) =57337a(8) =126532a(9) =337372a(10) =518161a(11) =555448a(12) =757156a(13) =811687a(14) =849583a(15) =1518076a(16) =3623809a(17) =4529623a(18) =6752431a(19) =6908068a(20) =6909961a(21) =7826888a(22) =9568183a(23) =13594936a(24) =16113217a(25) =20766748a(26) =21596722a(27) =28534984a(28) =34462456