OFFSET
0,1
COMMENTS
Numerator of g.f. is row polynomial sum(A061187(3,m)*x^m,m=0..5)/4.
FORMULA
a(n)=A060924(n+3, 3)/4.
G.f.: (x+1)*(3-2*x)*(1+11*x-11*x^2+4*x^3)/(1-3*x+x^2)^4.
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Wolfdieter Lang, Apr 20 2001
STATUS
approved