OFFSET
0,2
FORMULA
Row sums of triangle A183065.
PROG
(PARI) {a(n)=polcoeff(sum(m=0, n, (4*m)!/m!^4*x^(2*m)/(1-2*x+x*O(x^n))^(4*m+1)), n)}
CROSSREFS
KEYWORD
nonn
AUTHOR
Paul D. Hanna, Dec 22 2010
STATUS
approved