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A139295 2^(2p - 1)-1, where p is a Mersenne prime A000668(n). 4
31, 8191, 2305843009213693951, 14474011154664524427946373126085988481658748083205070504932198000989141204991 (list; graph; refs; listen; history; text; internal format)
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

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Last modified March 20 13:18 EDT 2019. Contains 321345 sequences. (Running on oeis4.)