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A139289 (2^(2p - 1)/2)-1, where p is prime. 8
3, 15, 255, 4095, 1048575, 16777215, 4294967295, 68719476735, 17592186044415, 72057594037927935, 1152921504606846975, 4722366482869645213695, 1208925819614629174706175, 19342813113834066795298815, 4951760157141521099596496895, 20282409603651670423947251286015, 83076749736557242056487941267521535 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Floris P. van Doorn and Jasper Mulder, Table of n, a(n) for n=1,...,260.

FORMULA

a(n)=(A139286(n)/2)-1.

MATHEMATICA

Table[(2^(2 Prime[p] - 1)/2) - 1, {p, 1, 20}] [From Floris P. van Doorn and Jasper Mulder (florisvandoorn(AT)hotmail.com), Oct 12 2009]

CROSSREFS

Cf. A139286, A139287, A139288, A139290, A139291, A139292, A139293, A139294, A139306.

Sequence in context: A288988 A257018 A173146 * A250405 A116518 A247174

Adjacent sequences:  A139286 A139287 A139288 * A139290 A139291 A139292

KEYWORD

nonn

AUTHOR

Omar E. Pol, Apr 13 2008

EXTENSIONS

More terms from Floris P. van Doorn and Jasper Mulder (florisvandoorn(AT)hotmail.com), Oct 12 2009

STATUS

approved

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Last modified April 25 16:08 EDT 2019. Contains 322461 sequences. (Running on oeis4.)