References to A061652

Even superperfect numbers: 2^(p-1) where 2^p-1 is a Mersenne prime (A000043 and A000668).
2, 4, 16, 64, 4096, 65536, 262144, 1073741824, 1152921504606846976

2 seqfan posts

Tue Apr 21 23:36:56 CEST 2009    [seqfan] comments about perfect numbers
Thu Feb 5 22:44:07 CET 2009    [seqfan] A061653 corrected!
Index of A-numbers in seqfan: by ascending order    by month    by frequency    by keyword
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