G.f. A(x) satisfies A(x/A(x)^3) = 1 + x ; thus A(x) = 1 + series_reversion(x/A(x)^3).
A120972
G.f. A(x) satisfies A(x/A(x)^3) = 1 + x ; thus A(x) = 1 + series_reversion(x/A(x)^3).
Terms
- a(0) =1a(1) =1a(2) =3a(3) =21a(4) =217a(5) =2814a(6) =42510a(7) =718647a(8) =13270944a(9) =263532276a(10) =5567092665a(11) =124143735663
External references
- oeis: A120972