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A126456
Column 1 of triangle A126454; a(n) = C( C(n+3,3) + 1, n).
5
1, 5, 55, 1330, 58905, 4187106, 437353560, 63140314380, 12049276177620, 2938311614386005, 891655291709643461, 329600203128234828790, 145830232567505064233200, 76102715775896720790887700
OFFSET
0,2
MATHEMATICA
Table[Binomial[Binomial[n+3, 3]+1, n], {n, 0, 20}] (* Harvey P. Dale, Feb 03 2015 *)
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