OFFSET
0,2
FORMULA
Column 1 of triangle A183065.
PROG
(PARI) {a(n)=polcoeff((1+21*x+3*x^2-x^3)/(1-x+x*O(x^n))^5, n)}
CROSSREFS
KEYWORD
nonn
AUTHOR
Paul D. Hanna, Dec 22 2010
STATUS
approved