OFFSET
0,2
LINKS
C. Elsner, On recurrence formulas for sums involving binomial coefficients, Fibonacci Quarterly, 43,1 (2005), 31-45.
MATHEMATICA
Table[Sum[k*Binomial[n, k]^2*Binomial[n + k, k]^3, {k, 0, n}], {n, 0, 20}] (* Vaclav Kotesovec, Jul 10 2021 *)
PROG
(PARI) a(n) = sum(k=0, n, k*binomial(n, k)^2*binomial(n+k, k)^3); \\ Michel Marcus, Mar 10 2016
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Nov 28 2005
STATUS
approved