G.f. satisfies: A(x) = exp( Sum_{n>=1} [Sum_{k=0..n} C(n,k)^3 * x^k*A(x)^(n-k)] * x^n/n ).
A200212
G.f. satisfies: A(x) = exp( Sum_{n>=1} [Sum_{k=0..n} C(n,k)^3 * x^k*A(x)^(n-k)] * x^n/n ).
Terms
- a(0) =1a(1) =1a(2) =3a(3) =11a(4) =42a(5) =174a(6) =763a(7) =3457a(8) =16075a(9) =76351a(10) =368767a(11) =1805682a(12) =8943948a(13) =44736096a(14) =225646033a(15) =1146461185a(16) =5862224756a(17) =30144922281a(18) =155791900727a(19) =808773877919
External references
- oeis: A200212