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
KEYWORD
nonn
AUTHOR
STATUS
approved