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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
OFFSET
1,2
LINKS
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
KEYWORD
nonn
STATUS
approved