Number of unreformed permutations of {1,...,n}.
A007711
Number of unreformed permutations of {1,...,n}.
Terms
- a(0) =0a(1) =1a(2) =4a(3) =18a(4) =105a(5) =636a(6) =4710a(7) =38508a(8) =352902a(9) =3563297a(10) =39467081a(11) =475326930a(12) =6198134207a(13) =86912048471
External references
- oeis: A007711