G.f. satisfies: A(x) = (1 + x*A(x)^2)^3.
A212072
G.f. satisfies: A(x) = (1 + x*A(x)^2)^3.
Terms
- a(0) =1a(1) =3a(2) =21a(3) =190a(4) =1950a(5) =21576a(6) =250971a(7) =3025308a(8) =37456650a(9) =473498025a(10) =6085977381a(11) =79296104784
External references
- oeis: A212072