A126447 Column 1 of triangle A126445; a(n) = C( C(n+3,3) - 1, n).

1, 3, 36, 969, 46376, 3478761, 377447148, 56017460733, 10912535409348, 2703343379981793, 830496702831140346, 310006778438284515093, 138247735223480364826280, 72613463426660610635960445

Offset

0,2

Links

Table of n, a(n) for n=0..13.

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

Cf. A126445; A126446, A126448, A126449; A126452, A126456, A126459.

Sequence in context: A004824 A132912 A303866 * A102921 A265475 A233197

Adjacent sequences: A126444 A126445 A126446 * A126448 A126449 A126450

Keyword

nonn

Author

Paul D. Hanna, Dec 27 2006

Status

approved