%I
%S 1,1,1,1,2,6,18,54,216,1080,5400,27000,162000,1134000,7938000,
%T 55566000,444528000,4000752000,36006768000,324060912000,3240609120000,
%U 35646700320000,392113703520000,4313250738720000
%N Ratios of successive terms are 1,1,1,2,3,3,3,4,5,5,5,6...
%F a(n) = prod_{j=0..n1} ( A180969(2,j+1)+A180969(2,j)+1 ) = a(n1) * ( A180969(2,n1)+A180969(2,n2)+1 ). [_Adriano Caroli_, Nov 27 2010]
%K nonn
%O 0,5
%A _N. J. A. Sloane_.
