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A134706
a(n) = nth perfect number divided by 2^n, minus 1.
0
2, 6, 61, 507, 1048447, 134216703, 1073739775, 9007199250546687, 5192296858534827626278696515534847, 187072209578355573530071658285452771612302071824383
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OFFSET
1,1
LINKS
Table of n, a(n) for n=1..10.
FORMULA
a(n)=(
A000396
(n)/(2^n))  1.
a(n) =
A134705
(n)1. 
R. J. Mathar
, Jan 30 2008
EXAMPLE
a(3)=61 because the 3rd perfect number is 496 and 2^3=8 and (496/8)1=61.
CROSSREFS
Cf.
A000396
,
A133028
.
Sequence in context:
A139771
A129665
A173606
*
A145756
A030170
A082640
Adjacent sequences:
A134703
A134704
A134705
*
A134707
A134708
A134709
KEYWORD
nonn
AUTHOR
Omar E. Pol
, Nov 07 2007
EXTENSIONS
More terms from
R. J. Mathar
, Jan 30 2008
STATUS
approved
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Last modified May 21 00:14 EDT 2024. Contains 372720 sequences. (Running on oeis4.)