Number of partial bijections (or subpermutations) of an n-element set with exactly 1 fixed point.
A144086
Number of partial bijections (or subpermutations) of an n-element set with exactly 1 fixed point.
Terms
- a(0) =0a(1) =1a(2) =2a(3) =12a(4) =72a(5) =540a(6) =4680a(7) =46200a(8) =510720a(9) =6244560a(10) =83613600a(11) =1216131840a(12) =19084222080a(13) =321271030080
External references
- oeis: A144086