OFFSET
6,2
LINKS
MAPLE
weigh:= proc(p) proc(n) local x, k; coeff(series(mul((1+x^k)^p(k), k=1..n), x, n+1), x, n) end end: wsh:= p-> n-> weigh(p)(n-1): f:= n-> `if`(n>0 and n<12, [1$3, 2$5, 1$3][n], 0): a:= (wsh@@2)(f)-wsh(f): seq(a(n), n=6..40); # Alois P. Heinz, Sep 10 2008
CROSSREFS
KEYWORD
nonn,fini
AUTHOR
Christian G. Bower, Jan 04 1999.
STATUS
approved