Number of permutations of [2n] with n ordered cycles such that equal-sized cycles are ordered with increasing least elements.
A285862
Number of permutations of [2n] with n ordered cycles such that equal-sized cycles are ordered with increasing least elements.
Terms
- a(0) =1a(1) =1a(2) =19a(3) =1005a(4) =62601a(5) =6061545a(6) =868380535a(7) =142349568361
External references
- oeis: A285862