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A139567
Bisection of ultraperfect numbers A139306.
2
8, 512, 33554432, 137438953472, 2658455991569831745807614120560689152
OFFSET
1,1
LINKS
FORMULA
a(n) = A139306(2*n-1). - Jinyuan Wang, Mar 14 2020
CROSSREFS
KEYWORD
nonn
AUTHOR
Omar E. Pol, May 08 2008
STATUS
approved