A375835 - cp's OEIS frontend

A375835 Triangle read by rows: T(n, k) is the number of chains of length k in the poset of permutations of an n-set.

n	a(n)
0	1
1	0
2	1
3	0
4	2
5	1
6	0
7	6
8	8
9	3
10	0
11	24
12	64
13	59
14	18
15	0
16	120
17	574
18	970
19	695
20	180
21	0
22	720
23	5858
24	16124
25	20240
26	11955
27	2700
28	0
29	5040
30	67752
31	285264
32	556591
33	559895
34	282555
35	56700
36	0
37	40320
38	880584
39	5459712
40	15519287
41	23585870
42	19879370
43	8780940
44	1587600
45	0
46	362880
47	12746208
48	113511982
49	451541898
50	971214825
51	1213062690
52	882179550
53	347072040
54	57153600

[1, 0, 1, 0, 2, 1, 0, 6, 8, 3, 0, 24, 64, 59, 18, 0, 120, 574, 970, 695, 180, 0, 720, 5858, 16124, 20240, 11955, 2700, 0, 5040, 67752, 285264, 556591, 559895, 282555, 56700, 0, 40320, 880584, 5459712, 15519287, 23585870, 19879370, 8780940, 1587600, 0, 362880, 12746208, 113511982, 451541898, 971214825, 1213062690, 882179550, 347072040, 57153600]

cp's OEIS Frontend

A375835 Triangle read by rows: T(n, k) is the number of chains of length k in the poset of permutations of an n-set.

Table of values

List of values