Positive numbers k such that k^2 - 1 divides 8^k - 1.

Terms

a(0) =2a(1) =4a(2) =8a(3) =10a(4) =16a(5) =22a(6) =36a(7) =40a(8) =64a(9) =96a(10) =100a(11) =196a(12) =210a(13) =256a(14) =280a(15) =316a(16) =456a(17) =560a(18) =820a(19) =1200a(20) =1236a(21) =1296a(22) =1360a(23) =1408a(24) =1600a(25) =1870a(26) =2380a(27) =2556a(28) =3516a(29) =3616