G.f. A(x) satisfies A(x) = 1/( 1 - x * (1+x)^3 * A(x) )^2.
A382894
G.f. A(x) satisfies A(x) = 1/( 1 - x * (1+x)^3 * A(x) )^2.
Terms
- a(0) =1a(1) =2a(2) =13a(3) =78a(4) =520a(5) =3664a(6) =26859a(7) =202808a(8) =1566693a(9) =12323982a(10) =98381841a(11) =795023284a(12) =6490951398a(13) =53462144788a(14) =443683640945
External references
- oeis: A382894