OFFSET
0,2
COMMENTS
Numerator polynomial of g.f. is sum(A061176(4,m)*x^m,m=0..4).
FORMULA
a(n)= A060920(n+3, 3).
G.f.: (1+2*x-5*x^2+2*x^3+x^4)/(1-3*x+x^2)^4.
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Wolfdieter Lang, Apr 20 2001
STATUS
approved