G.f. A(x) satisfies: x = A(x) * (1 + 2*A(x)) * (1 - 5*A(x)).
A250890
G.f. A(x) satisfies: x = A(x) * (1 + 2*A(x)) * (1 - 5*A(x)).
Terms
- a(0) =1a(1) =3a(2) =28a(3) =285a(4) =3324a(5) =41286a(6) =537528a(7) =7233633a(8) =99829180a(9) =1405109706a(10) =20092995624a(11) =291094349442
External references
- oeis: A250890