G.f. satisfies: A(A(x)) = Sum_{n>=1} a(n)*x^n / Product_{k=1..n} (1 - k*x), where g.f. A(x) = Sum_{n>=1} a(n)*x^n.
A193208
G.f. satisfies: A(A(x)) = Sum_{n>=1} a(n)*x^n / Product_{k=1..n} (1 - k*x), where g.f. A(x) = Sum_{n>=1} a(n)*x^n.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =9a(4) =80a(5) =1209a(6) =27737a(7) =894103a(8) =38403519a(9) =2115673941a(10) =145255332677
External references
- oeis: A193208