Number of functions f:{1,2,...,n} -> {1,2,...,n} such that the 1 and the 2 are in the same component of the functional digraph representation of f.
A226349
Number of functions f:{1,2,...,n} -> {1,2,...,n} such that the 1 and the 2 are in the same component of the functional digraph representation of f.
Terms
- a(0) =0a(1) =0a(2) =3a(3) =20a(4) =188a(5) =2280a(6) =33864a(7) =595196a(8) =12081600a(9) =278122032a(10) =7159299200a(11) =203771364324
External references
- oeis: A226349