A139295 2^(2p - 1)-1, where p is a Mersenne prime A000668(n).

31, 8191, 2305843009213693951, 14474011154664524427946373126085988481658748083205070504932198000989141204991

Offset

1,1

Links

Table of n, a(n) for n=1..4.

Formula

a(n) = 2^(2*A000668(n)-1)-1 = A139294(n)-1.

Crossrefs

Sequence in context: A136676 A135811 A119598 * A261947 A069451 A073099

Adjacent sequences: A139292 A139293 A139294 * A139296 A139297 A139298

Keyword

nonn

Author

Omar E. Pol, Apr 13 2008

Status

approved