A179973 - cp's OEIS frontend

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).

n	a(n)
0	1
1	1
2	2
3	4
4	12
5	42
6	216
7	1200
8	8664
9	66384
10	612264
11	5910024
12	66723384
13	776642664
14	10311400344
15	141065450904
16	2153769250584
17	33743736435864
18	583781959921944
19	10308436641381144
20	198863818304824344
21	3914117125411211544
22	83301822014343774744
23	1805447764831655109144

[1, 1, 2, 4, 12, 42, 216, 1200, 8664, 66384, 612264, 5910024, 66723384, 776642664, 10311400344, 141065450904, 2153769250584, 33743736435864, 583781959921944, 10308436641381144, 198863818304824344, 3914117125411211544, 83301822014343774744, 1805447764831655109144]

cp's OEIS Frontend

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).

Table of values

List of values