Numbers k such that k^2 + 1 divides 2^k + 8.

Terms

a(0) =0a(1) =1a(2) =17a(3) =37a(4) =77a(5) =197a(6) =513a(7) =993a(8) =1837a(9) =2617a(10) =2637a(11) =4097a(12) =5437a(13) =65537a(14) =261633a(15) =364137a(16) =437837a(17) =2097153a(18) =16777217a(19) =32761917a(20) =54644032237a(21) =68719476737a(22) =137438953473