G.f. satisfies A(x) = 1 + x*A(x)*(2 + A(x)^3).
A364432
G.f. satisfies A(x) = 1 + x*A(x)*(2 + A(x)^3).
Terms
- a(0) =1a(1) =3a(2) =18a(3) =162a(4) =1728a(5) =20169a(6) =249318a(7) =3207600a(8) =42500700a(9) =576012060a(10) =7947785448a(11) =111269613006
External references
- oeis: A364432