A122843 - cp's OEIS frontend

A122843 Triangle read by rows: T(n,k) = the number of ascending runs of length k in the permutations of [n] for k <= n.

n	a(n)
1	1
2	2
3	1
4	7
5	4
6	1
7	32
8	21
9	6
10	1
11	180
12	130
13	41
14	8
15	1
16	1200
17	930
18	312
19	67
20	10
21	1
22	9240
23	7560
24	2646
25	602
26	99
27	12
28	1
29	80640
30	68880
31	24864
32	5880
33	1024
34	137
35	14
36	1
37	786240
38	695520
39	257040
40	62496
41	11304
42	1602
43	181
44	16
45	1
46	8467200
47	7711200
48	2903040
49	720720
50	133920
51	19710
52	2360
53	231
54	18
55	1

[1, 2, 1, 7, 4, 1, 32, 21, 6, 1, 180, 130, 41, 8, 1, 1200, 930, 312, 67, 10, 1, 9240, 7560, 2646, 602, 99, 12, 1, 80640, 68880, 24864, 5880, 1024, 137, 14, 1, 786240, 695520, 257040, 62496, 11304, 1602, 181, 16, 1, 8467200, 7711200, 2903040, 720720, 133920, 19710, 2360, 231, 18, 1]

cp's OEIS Frontend

A122843 Triangle read by rows: T(n,k) = the number of ascending runs of length k in the permutations of [n] for k <= n.

Table of values

List of values