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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
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]
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