OFFSET
0,2
MATHEMATICA
Table[Binomial[(n(n-1))/2+n+3, n], {n, 0, 20}] (* Harvey P. Dale, Oct 05 2019 *)
PROG
(PARI) a(n)=binomial(n*(n-1)/2+n+3, n)
CROSSREFS
KEYWORD
nonn
AUTHOR
Paul D. Hanna, Jun 04 2005
STATUS
approved