A175905 Numbers n such that n = 4*(2*i+1)+1 and 2^(n-2) == 1 (mod (2*i+1)).

5, 29, 2045, 40133, 971837, 5063357, 7354397, 16554917, 17786525, 42244637, 52717277, 79704029, 84896957, 153424637, 262984997, 288644957, 328721213, 350252957, 353294757, 393411197, 498253253, 613578149, 634102757, 876046277

Offset

1,1

Links

Max Alekseyev, Table of n, a(n) for n = 1..79

Mathematica

fQ[n_] := PowerMod[2, 8n + 3, 2n + 1] == 1; k = 1; lst = {5}; While[k < 10^9/8, If[ fQ@k, AppendTo[lst, 8k + 5]; Print[8k + 5]]; k++ ] (* Robert G. Wilson v, Oct 20 2010 *)

Crossrefs

Sequence in context: A273918 A085553 A057208 * A057706 A057705 A237188

Adjacent sequences: A175902 A175903 A175904 * A175906 A175907 A175908

Keyword

nonn

Author

Alzhekeyev Ascar M, Oct 12 2010

Extensions

a(13) onwards from Robert G. Wilson v, Oct 20 2010

Status

approved