G.f. satisfies: A(x) = Product_{n>=1} (1 + x^n*A(x))^2/((1-x^n)*(1 - x^n*A(x)^2)).
A192625
G.f. satisfies: A(x) = Product_{n>=1} (1 + x^n*A(x))^2/((1-x^n)*(1 - x^n*A(x)^2)).
Terms
- a(0) =1a(1) =4a(2) =28a(3) =240a(4) =2348a(5) =24952a(6) =280192a(7) =3271232a(8) =39310668a(9) =483032980a(10) =6041149272a(11) =76648727632a(12) =984161689728
External references
- oeis: A192625