G.f. A(x) satisfies A(x) = 1/( 1 - 9*x*(1 + x*A(x)) )^(1/3).
A372089
G.f. A(x) satisfies A(x) = 1/( 1 - 9*x*(1 + x*A(x)) )^(1/3).
Terms
- a(0) =1a(1) =3a(2) =21a(3) =171a(4) =1512a(5) =14040a(6) =134775a(7) =1325457a(8) =13279329a(9) =135014931a(10) =1389328200a(11) =14440275000a(12) =151366896639
External references
- oeis: A372089