The number of (simultaneously) fixed and isolated points in the digraph representation of all functions f:{1,2,...,n}->{1,2,...,n}.
A200248
The number of (simultaneously) fixed and isolated points in the digraph representation of all functions f:{1,2,...,n}->{1,2,...,n}.
Terms
- a(0) =0a(1) =1a(2) =2a(3) =9a(4) =68a(5) =710a(6) =9414a(7) =151032a(8) =2840648a(9) =61247664a(10) =1488691530a(11) =40262372480
External references
- oeis: A200248