G.f. A(x) = Sum_{n>=0} A_{2*n}(x)^(n+1) where A_{n+1}(x) = A_n(A(x)) with A_0(x)=x and A(0)=0.
A232685
G.f. A(x) = Sum_{n>=0} A_{2*n}(x)^(n+1) where A_{n+1}(x) = A_n(A(x)) with A_0(x)=x and A(0)=0.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =41a(4) =433a(5) =5361a(6) =74261a(7) =1120425a(8) =18103665a(9) =309717425a(10) =5565231157a(11) =104412465657
External references
- oeis: A232685