G.f. A(x) satisfies: A( x*A(x) - 2*x*A(x)^2 + x*A(x)^3 ) = x^2.
A272821
G.f. A(x) satisfies: A( x*A(x) - 2*x*A(x)^2 + x*A(x)^3 ) = x^2.
Terms
- a(0) =1a(1) =2a(2) =5a(3) =22a(4) =104a(5) =508a(6) =2581a(7) =13590a(8) =73255a(9) =402096a(10) =2240803a(11) =12645756a(12) =72120577a(13) =415017628a(14) =2406756231a(15) =14051487550a(16) =82524268241a(17) =487209739242
External references
- oeis: A272821