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

 

Logo

Annual appeal: Please make a donation to keep the OEIS running! Over 6000 articles have referenced us, often saying "we discovered this result with the help of the OEIS".
Other ways to donate

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A022918 Multinomial coefficients(TOP, BOTTOM), where TOP = n(n+1)(2n+1)/6, BOTTOM = ( 1^2 2^2 ... n^2 ). 1
1, 5, 10010, 1455680976750, 4492014649431378228480321000, 128588605335042465692190540763466217456052544386524000 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Alois P. Heinz, Table of n, a(n) for n = 1..14

MAPLE

with(combinat):

a:= n-> multinomial(n*(n+1)*(2*n+1)/6, i^2$i=1..n):

seq(a(n), n=1..8);  # Alois P. Heinz, Sep 24 2013

CROSSREFS

Sequence in context: A076629 A052027 A109514 * A212617 A160741 A101846

Adjacent sequences:  A022915 A022916 A022917 * A022919 A022920 A022921

KEYWORD

nonn

AUTHOR

Clark Kimberling

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 13 09:55 EST 2017. Contains 295957 sequences.