G.f. A(x) satisfies A( x^2 + 2*x^3 + 2*A(x)^2 ) = 3*A(x)^2.
A389474
G.f. A(x) satisfies A( x^2 + 2*x^3 + 2*A(x)^2 ) = 3*A(x)^2.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =14a(4) =104a(5) =488a(6) =3291a(7) =18141a(8) =127527a(9) =790427a(10) =5441663a(11) =35375651a(12) =244925743a(13) =1652908531a(14) =11518757017a(15) =79372305657a(16) =557324355555
External references
- oeis: A389474