G.f. satisfies: A(x) = Sum_{n>=0} (A(x)^n + 2)^n * x^n / (1+2*x)^(n+1).
A251180
G.f. satisfies: A(x) = Sum_{n>=0} (A(x)^n + 2)^n * x^n / (1+2*x)^(n+1).
Terms
- a(0) =1a(1) =1a(2) =2a(3) =11a(4) =59a(5) =376a(6) =2566a(7) =18646a(8) =141857a(9) =1120851a(10) =9141387a(11) =76635239a(12) =658411100a(13) =5784858465a(14) =51899580702a(15) =474971067333
External references
- oeis: A251180