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A153475
Sum of the first n even superperfect numbers (A061652).
3
2, 6, 22, 86, 4182, 69718, 331862, 1074073686, 1152921505680920662, 309485010974266574405701718, 81129947899617655962363410845782, 85070672860182515483499614221352898646
OFFSET
1,1
COMMENTS
Also, sum of first n superperfect numbers A019279, if there are no odd superperfect numbers.
FORMULA
a(n) = A061652(1) + A061652(2) + ... + A061652(n). - Max Alekseyev, Jul 27 2009
CROSSREFS
KEYWORD
nonn
AUTHOR
Omar E. Pol, Dec 27 2008
EXTENSIONS
More terms from Max Alekseyev, Jul 27 2009
STATUS
approved