A153475 Sum of the first n even superperfect numbers (A061652).

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.

Links

Table of n, a(n) for n=1..12.

Formula

a(n) = A061652(1) + A061652(2) + ... + A061652(n). - Max Alekseyev, Jul 27 2009

Crossrefs

Cf. A092336, A019279, A061652, A153474, A153476.

Sequence in context: A150258 A073075 A299021 * A150259 A165531 A374542

Adjacent sequences: A153472 A153473 A153474 * A153476 A153477 A153478

Keyword

nonn

Author

Omar E. Pol, Dec 27 2008

Extensions

More terms from Max Alekseyev, Jul 27 2009

Status

approved