A153476 Sum of first n even superperfect numbers A061652, divided by 2.

1, 3, 11, 43, 2091, 34859, 165931, 537036843, 576460752840460331, 154742505487133287202850859, 40564973949808827981181705422891, 42535336430091257741749807110676449323

Offset

1,2

Comments

Also, sum of first n superperfect numbers A019279, divided by 2, if there are no odd superperfect numbers.

Links

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

Formula

a(n) = A153475(n)/2 [From Max Alekseyev, Jul 27 2009]

Crossrefs

Cf. A153474, A153475.

Sequence in context: A126614 A000979 A123628 * A107290 A302333 A377814

Adjacent sequences: A153473 A153474 A153475 * A153477 A153478 A153479

Keyword

nonn

Author

Omar E. Pol, Dec 27 2008

Extensions

More terms from Max Alekseyev, Jul 27 2009

Status

approved