A139568 Bisection of ultraperfect numbers A139306.

32, 8192, 8589934592, 2305843009213693952, 191561942608236107294793378393788647952342390272950272

Offset: 1

Author

Omar E. Pol, May 08 2008

Keywords

• nonn

Links

• Jinyuan Wang, Table of n, a(n) for n = 1..7

Crossrefs

Cf. A099057, A099058, A139306, A139563, A139564, A139567.

Formula

a(n) = A139306(2*n). - Jinyuan Wang, Mar 14 2020