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A138835 Bisection of even superperfect numbers A061652. 0
4, 64, 65536, 1073741824, 309485009821345068724781056, 85070591730234615865843651857942052864 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Also, bisection of superperfect numbers A019279, if there are no odd superperfect numbers.

Next terms have 183, 663 and more digits and are therefore not listed. - R. J. Mathar, May 22 2008

LINKS

Table of n, a(n) for n=1..6.

CROSSREFS

Cf. A019279, A061652, A099057, A099058, A134721, A134722, A138834.

Sequence in context: A146520 A030176 A033635 * A234608 A119601 A058438

Adjacent sequences:  A138832 A138833 A138834 * A138836 A138837 A138838

KEYWORD

nonn

AUTHOR

Omar E. Pol, Apr 06 2008

STATUS

approved

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Last modified November 30 17:04 EST 2021. Contains 349424 sequences. (Running on oeis4.)