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A139567
Bisection of ultraperfect numbers
A139306
.
2
8, 512, 33554432, 137438953472, 2658455991569831745807614120560689152
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OFFSET
1,1
LINKS
Jinyuan Wang,
Table of n, a(n) for n = 1..8
FORMULA
a(n) =
A139306
(2*n-1). -
Jinyuan Wang
, Mar 14 2020
CROSSREFS
Cf.
A099057
,
A099058
,
A139306
,
A139563
,
A139564
,
A139568
.
Sequence in context:
A154025
A013713
A109966
*
A035131
A067512
A067505
Adjacent sequences:
A139564
A139565
A139566
*
A139568
A139569
A139570
KEYWORD
nonn
AUTHOR
Omar E. Pol
, May 08 2008
STATUS
approved
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Last modified April 18 22:18 EDT 2024. Contains 371782 sequences. (Running on oeis4.)