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A139301 (2^(2p - 1)/8)-1, where p is a Mersenne prime A000668(n). 3
3, 1023, 288230376151711743 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..3.

FORMULA

a(n) = (2^(2*A000668(n)-1)/8)-1 = (A139294(n)/8)-1.

CROSSREFS

Sequence in context: A167069 A024046 A152505 * A004803 A065604 A062612

Adjacent sequences:  A139298 A139299 A139300 * A139302 A139303 A139304

KEYWORD

bref,nonn

AUTHOR

Omar E. Pol, Apr 13 2008

STATUS

approved

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Last modified October 21 20:44 EDT 2019. Contains 328315 sequences. (Running on oeis4.)