A008971 - cp's OEIS frontend

A008971 Triangle read by rows: T(n,k) is the number of permutations of [n] with k increasing runs of length at least 2.

n	a(n)
0	1
1	1
2	1
3	1
4	1
5	5
6	1
7	18
8	5
9	1
10	58
11	61
12	1
13	179
14	479
15	61
16	1
17	543
18	3111
19	1385
20	1
21	1636
22	18270
23	19028
24	1385
25	1
26	4916
27	101166
28	206276
29	50521
30	1
31	14757
32	540242
33	1949762
34	1073517
35	50521
36	1
37	44281
38	2819266
39	16889786
40	17460701
41	2702765
42	1
43	132854
44	14494859

[1, 1, 1, 1, 1, 5, 1, 18, 5, 1, 58, 61, 1, 179, 479, 61, 1, 543, 3111, 1385, 1, 1636, 18270, 19028, 1385, 1, 4916, 101166, 206276, 50521, 1, 14757, 540242, 1949762, 1073517, 50521, 1, 44281, 2819266, 16889786, 17460701, 2702765, 1, 132854, 14494859]

cp's OEIS Frontend

A008971 Triangle read by rows: T(n,k) is the number of permutations of [n] with k increasing runs of length at least 2.

Table of values

List of values