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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A108929 Expansion of (1-x^4-2*x^3)/((x-1)*(x^2+x+1)*(x^2+4*x-1)). 0
1, 4, 17, 71, 300, 1271, 5383, 22802, 96591, 409165, 1733250, 7342165, 31101909, 131749800, 558101109, 2364154235, 10014718048, 42423026427, 179706823755, 761250321446, 3224708109539, 13660082759601, 57865039147942 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..22.

MAPLE

seriestolist(series((1-x^4-2*x^3)/((x-1)*(x^2+x+1)*(x^2+4*x-1)), x=0, 25)); -or- -1kbaseksum[A*B] with A = - 'i + 'j - i' + j' - 'kk' - 'ik' - 'jk' - 'ki' - 'kj' and B = + .5'i + .5i'; SumType: default

CROSSREFS

Sequence in context: A136792 A188482 A179606 * A297578 A022031 A255117

Adjacent sequences:  A108926 A108927 A108928 * A108930 A108931 A108932

KEYWORD

easy,nonn

AUTHOR

Creighton Dement, Jul 19 2005

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
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified October 14 08:54 EDT 2019. Contains 327995 sequences. (Running on oeis4.)