Number of partial functions f:{1,2,...,n}->{1,2,...,n} such that every element in the domain of definition of f is mapped to a fixed point or to an element that is undefined by f.
A275707
Number of partial functions f:{1,2,...,n}->{1,2,...,n} such that every element in the domain of definition of f is mapped to a fixed point or to an element that is undefined by f.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =38a(4) =216a(5) =1402a(6) =10156a(7) =80838a(8) =698704a(9) =6498674a(10) =64579284a(11) =681642238a(12) =7605025720a(13) =89318058858
External references
- oeis: A275707