The number of functions in a finite set for which the sequence of composition powers ends in a length 2 cycle.
A163951
The number of functions in a finite set for which the sequence of composition powers ends in a length 2 cycle.
Terms
- a(0) =0a(1) =0a(2) =1a(3) =9a(4) =93a(5) =1155a(6) =17025a(7) =292383a(8) =5752131a(9) =127790505a(10) =3167896005a(11) =86756071545
External references
- oeis: A163951