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A139298 a(n) = 2^(2p - 1)/4, where p is the n-th Mersenne prime A000668(n). 4
8, 2048, 576460752303423488, 3618502788666131106986593281521497120414687020801267626233049500247285301248 (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)/4 = A139294(n)/4.

CROSSREFS

Sequence in context: A299306 A299464 A300107 * A004819 A001375 A281651

Adjacent sequences:  A139295 A139296 A139297 * A139299 A139300 A139301

KEYWORD

nonn

AUTHOR

Omar E. Pol, Apr 13 2008

STATUS

approved

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Last modified March 21 10:09 EDT 2019. Contains 321368 sequences. (Running on oeis4.)