The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
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!)
A028026 Expansion of 1/((1-3x)(1-4x)(1-5x)(1-7x)). 0
1, 19, 230, 2270, 19971, 163569, 1278040, 9670540, 71557541, 521211119, 3754036650, 26822296410, 190541788711, 1347984742669, 9507913700060, 66919750327880, 470277075161481, 3301201972518219, 23154999755212270, 162319024049252950, 1137407684744763851 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,2
LINKS
FORMULA
a(n) = (7^(n+3)-6*5^(n+3)+8*4^(n+3)-3^(n+4))/24. - Yahia Kahloune, May 22 2013.
MATHEMATICA
CoefficientList[Series[1/((1-3x)(1-4x)(1-5x)(1-7x)), {x, 0, 20}], x] (* Harvey P. Dale, Apr 05 2019 *)
CROSSREFS
Sequence in context: A243420 A125431 A104116 * A135487 A025965 A276201
KEYWORD
nonn,easy
AUTHOR
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 May 23 10:34 EDT 2024. Contains 372760 sequences. (Running on oeis4.)