A122844 - cp's OEIS frontend

A122844 Triangle read by rows: T[n,k] = the number of ascending runs of length at least k in the permutations of [n] for k <= n.

n	a(n)
1	1
2	3
3	1
4	12
5	5
6	1
7	60
8	28
9	7
10	1
11	360
12	180
13	50
14	9
15	1
16	2520
17	1320
18	390
19	78
20	11
21	1
22	20160
23	10920
24	3360
25	714
26	112
27	13
28	1
29	181440
30	100800
31	31920
32	7056
33	1176
34	152
35	15
36	1
37	1814400
38	1028160
39	332640
40	75600
41	13104
42	1800
43	198
44	17
45	1

[1, 3, 1, 12, 5, 1, 60, 28, 7, 1, 360, 180, 50, 9, 1, 2520, 1320, 390, 78, 11, 1, 20160, 10920, 3360, 714, 112, 13, 1, 181440, 100800, 31920, 7056, 1176, 152, 15, 1, 1814400, 1028160, 332640, 75600, 13104, 1800, 198, 17, 1]

cp's OEIS Frontend

A122844 Triangle read by rows: T[n,k] = the number of ascending runs of length at least k in the permutations of [n] for k <= n.

Table of values

List of values