Number of permutations of [2n] in which the size of the last cycle is n and the cycles are ordered by increasing smallest elements.
A322450
Number of permutations of [2n] in which the size of the last cycle is n and the cycles are ordered by increasing smallest elements.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =60a(4) =2016a(5) =120960a(6) =11404800a(7) =1556755200a(8) =290594304000
External references
- oeis: A322450