G.f. A(x) satisfies A(x) = (1 + x)/(1 - x*A(x))^3.
A379171
G.f. A(x) satisfies A(x) = (1 + x)/(1 - x*A(x))^3.
Terms
- a(0) =1a(1) =4a(2) =21a(3) =139a(4) =1021a(5) =8010a(6) =65708a(7) =556751a(8) =4834686a(9) =42800265a(10) =384832083a(11) =3504693519a(12) =32261240127a(13) =299685628629
External references
- oeis: A379171