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%I #5 Mar 14 2020 09:08:09
%S 8,512,33554432,137438953472,2658455991569831745807614120560689152
%N Bisection of ultraperfect numbers A139306.
%H Jinyuan Wang, <a href="/A139567/b139567.txt">Table of n, a(n) for n = 1..8</a>
%F a(n) = A139306(2*n-1). - _Jinyuan Wang_, Mar 14 2020
%Y Cf. A099057, A099058, A139306, A139563, A139564, A139568.
%K nonn
%O 1,1
%A _Omar E. Pol_, May 08 2008
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