G.f. satisfies: A(x) = exp( Sum_{n>=1} (Sum_{k=0..n} C(n,k)^3 * x^k*A(x)^k) * x^n*A(x)^n/n ).
A200215
G.f. satisfies: A(x) = exp( Sum_{n>=1} (Sum_{k=0..n} C(n,k)^3 * x^k*A(x)^k) * x^n*A(x)^n/n ).
Terms
- a(0) =1a(1) =1a(2) =3a(3) =13a(4) =61a(5) =306a(6) =1623a(7) =8937a(8) =50565a(9) =292283a(10) =1718827a(11) =10250916a(12) =61854848a(13) =376949934a(14) =2316738789a(15) =14343701657a(16) =89379109846a(17) =560108223900
External references
- oeis: A200215