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A126455 Column 0 of triangle A126454; a(n) = C( C(n+2,3) + 2, n). 5

%I

%S 1,3,15,220,7315,435897,40475358,5373200880,962889794295,

%T 223581013518060,65230517839369311,23345156728397937888,

%U 10052806195411162278095,5126493560257678027274800

%N Column 0 of triangle A126454; a(n) = C( C(n+2,3) + 2, n).

%t Table[Binomial[Binomial[n+2,3]+2,n],{n,0,20}] (* _Harvey P. Dale_, Dec 08 2018 *)

%o (PARI) a(n)=binomial(n*(n+1)*(n+2)/3!+2, n)

%Y Cf. A126454, A126456; A126446, A126451, A126458.

%K nonn

%O 0,2

%A _Paul D. Hanna_, Dec 27 2006

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Last modified October 4 01:04 EDT 2022. Contains 357237 sequences. (Running on oeis4.)