a(n) = Sum_{k=0..n} C(2n,k)*A126155(n,k).A126159a(n) = Sum_{k=0..n} C(2n,k)*A126155(n,k).Terms a(0) =1a(1) =12a(2) =624a(3) =72768a(4) =15073536a(5) =4879690752External referencesoeis: A126159