G.f.: A(x) = Sum_{n>=0} x^n/(1 - 4^n*x)^n.
A193199
G.f.: A(x) = Sum_{n>=0} x^n/(1 - 4^n*x)^n.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =49a(4) =1025a(5) =42241a(6) =3610625a(7) =609251329a(8) =210923290625
External references
- oeis: A193199
A193199
G.f.: A(x) = Sum_{n>=0} x^n/(1 - 4^n*x)^n.