login
This site is supported by donations to The OEIS Foundation.

 

Logo

Annual Appeal: Please make a donation (tax deductible in USA) to keep the OEIS running. Over 5000 articles have referenced us, often saying "we discovered this result with the help of the OEIS".

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
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 A262280 A027968

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

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy .

Last modified December 3 07:27 EST 2016. Contains 278698 sequences.