a(n) equals the coefficient of x^(n-1) in the (n-1)-th iteration of g.f. A(x) for n>1, with a(1)=1.
A119819
a(n) equals the coefficient of x^(n-1) in the (n-1)-th iteration of g.f. A(x) for n>1, with a(1)=1.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =12a(4) =138a(5) =2370a(6) =54190a(7) =1553258a(8) =53883088a(9) =2211883428a(10) =105760271082
External references
- oeis: A119819