%I #3 Mar 30 2012 18:37:02

%S 1,4,21,286,8855,501942,45057474,5843355957,1029873432159,

%T 236236542585120,68292983465630781,24268885951464043344,

%U 10392619362579990298763,5276256293478688846049120

%N Column 0 of triangle A126457; a(n) = C( C(n+2,3) + 3, n).

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

%Y Cf. A126457, A126459; A126446, A126451, A126455.

%K nonn

%O 0,2

%A _Paul D. Hanna_, Dec 27 2006