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A139567 Bisection of ultraperfect numbers A139306. 2
8, 512, 33554432, 137438953472, 2658455991569831745807614120560689152 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
FORMULA
a(n) = A139306(2*n-1). - Jinyuan Wang, Mar 14 2020
CROSSREFS
Sequence in context: A154025 A013713 A109966 * A035131 A067512 A067505
KEYWORD
nonn
AUTHOR
Omar E. Pol, May 08 2008
STATUS
approved

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Last modified March 19 04:58 EDT 2024. Contains 370952 sequences. (Running on oeis4.)