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A131046 A007318 * A000203. 0
1, 4, 11, 29, 71, 168, 389, 884, 1978, 4375, 9592, 20874, 45124, 96979, 207402, 441724, 937393, 1982767, 4181349, 8793756, 18448907, 38620883, 80690867, 168285817, 350383797, 728381793, 1511953441, 3134224224, 6489055959, 13419472021 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..30.

FORMULA

Binomial transform of sigma(n), A000203.

EXAMPLE

a(4) = 29 = (1, 3, 3, 1) dot (1, 3, 4, 7) = (1 + 9 + 12 + 7).

CROSSREFS

Cf. A000203, A007318.

Sequence in context: A055418 A062432 A220018 * A109803 A027968 A027970

Adjacent sequences:  A131043 A131044 A131045 * A131047 A131048 A131049

KEYWORD

nonn

AUTHOR

Gary W. Adamson, Jun 11 2007

EXTENSIONS

More terms from Carl Najafi, Sep 08 2011

STATUS

approved

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Last modified July 28 12:23 EDT 2014. Contains 244997 sequences.