A026331 - OEIS

%I #4 Mar 30 2012 18:56:06

%S 1,6,30,161,882,4916,27729,157830,904706,5215310,30203901,175598997,

%T 1024234850,5990912280,35126915550,206399581434,1215040298106,

%U 7164651246340,42310256416456,250194442456101,1481274328929984,8779528511274564

%N a(n) = T(2n-1,n), where T is the array in A026323.

%K nonn

%O 1,2

%A _Clark Kimberling_