G.f. A(x) satisfies A(x) = (1 + x*A(x)*(1 + x*A(x))^2)^2.
A365129
G.f. A(x) satisfies A(x) = (1 + x*A(x)*(1 + x*A(x))^2)^2.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =44a(4) =240a(5) =1386a(6) =8346a(7) =51802a(8) =329086a(9) =2129330a(10) =13984095a(11) =92974510a(12) =624568680a(13) =4232731050a(14) =28904102829a(15) =198688337014
External references
- oeis: A365129