The number of functions f:{1,2,...,n}->{1,2,...,n} (endofunctions) such that all of the fixed points in f are isolated.

A204042

The number of functions f:{1,2,...,n}->{1,2,...,n} (endofunctions) such that all of the fixed points in f are isolated.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =12a(4) =120a(5) =1520a(6) =23160a(7) =413952a(8) =8505280a(9) =197631072a(10) =5125527360a(11) =146787894440

External references