login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A025972 Expansion of 1/((1-2x)(1-4x)(1-7x)(1-9x)). 0
1, 22, 317, 3806, 41421, 424974, 4198189, 40430302, 382529741, 3573890606, 33084972141, 304212832638, 2783085627661, 25364095795918, 230491675046573, 2089930913053214, 18917927670786381, 171021229569836910 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..17.

Index entries for linear recurrences with constant coefficients, signature (22,-167,506,-504).

FORMULA

a(n) = -4*2^n/35 +32*4^n/15 -343*7^n/30 +729*9^n/70. - R. J. Mathar, Jun 20 2013

MATHEMATICA

CoefficientList[Series[1/((1-2x)(1-4x)(1-7x)(1-9x)), {x, 0, 30}], x] (* Harvey P. Dale, Sep 21 2020 *)

CROSSREFS

Sequence in context: A025988 A267132 A023949 * A028029 A022453 A025968

Adjacent sequences:  A025969 A025970 A025971 * A025973 A025974 A025975

KEYWORD

nonn

AUTHOR

N. J. A. Sloane.

STATUS

approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified October 2 23:51 EDT 2022. Contains 357230 sequences. (Running on oeis4.)