A095737 Mersenne-like sequence factors of complex real square type 2*Prime[m]^2-n^2-1.

2, 3, 5, 7, 9, 11, 13, 15, 17, 19, 23, 25, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 101, 103, 107, 109, 113, 127, 131, 137, 139, 149, 151, 157, 163, 167, 173, 179, 181, 191, 193, 197, 199, 211, 223, 227, 229, 233, 239, 241, 251, 257, 263, 269

Offset

1,1

Links

Table of n, a(n) for n=1..60.

Formula

a(n) =if (2^n-1)/(Prime[m]^2-n^2-1)=Integer then n

Mathematica

digits=300 a=Delete[Union[Flatten[Table[If[ IntegerQ[(2^n-1)/(Prime[m]^2-n^2-1)]==True, n, 0], {n, 1, digits}, {m, 1, digits}]]], 1]

Crossrefs

Sequence in context: A324697 A082664 A342008 * A054022 A185603 A046654

Adjacent sequences: A095734 A095735 A095736 * A095738 A095739 A095740

Keyword

nonn,uned

Author

Roger L. Bagula, Jul 06 2004

Status

approved