Number of permutations of [n] whose cycle lengths are nondecreasing when cycles are ordered by their minima and these minima are {1..k} (for some k <= n).
A179973
Number of permutations of [n] whose cycle lengths are nondecreasing when cycles are ordered by their minima and these minima are {1..k} (for some k <= n).
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =12a(5) =42a(6) =216a(7) =1200a(8) =8664a(9) =66384a(10) =612264a(11) =5910024a(12) =66723384a(13) =776642664a(14) =10311400344a(15) =141065450904
External references
- oeis: A179973