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A061652
Even superperfect numbers: 2^(p-1) where 2^p-1 is a Mersenne prime (
A000043
and
A000668
).
+0
54
2, 4, 16, 64, 4096, 65536, 262144, 1073741824, 1152921504606846976, 309485009821345068724781056, 81129638414606681695789005144064, 85070591730234615865843651857942052864
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
)
Last modified December 11 12:57 EST 2009. Contains 170656 sequences.
AT&T Labs Research
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