OFFSET
0,2
MATHEMATICA
Table[Binomial[Binomial[n+3, 3]-1, n], {n, 0, 20}] (* Harvey P. Dale, Apr 22 2022 *)
PROG
(PARI) a(n)=binomial((n+1)*(n+2)*(n+3)/3!-1, n)
CROSSREFS
KEYWORD
nonn
AUTHOR
Paul D. Hanna, Dec 27 2006
STATUS
approved