A097898 - cp's OEIS frontend

A097898 Triangle read by rows: T(n,k) is the number of permutations of [n] with k runs of length 1. For example, 457/3/26/1 has two runs of length 1: 3 and 1.

n	a(n)
0	1
1	0
2	1
3	1
4	0
5	1
6	1
7	4
8	0
9	1
10	6
11	6
12	11
13	0
14	1
15	19
16	51
17	23
18	26
19	0
20	1
21	109
22	212
23	269
24	72
25	57
26	0
27	1
28	588
29	1571
30	1419
31	1140
32	201
33	120
34	0
35	1
36	4033
37	10470
38	13343
39	7432
40	4272
41	522
42	247
43	0
44	1
45	29485
46	87672
47	107853
48	87552
49	33683
50	14841
51	1291
52	502
53	0
54	1
55	246042
56	763612

[1, 0, 1, 1, 0, 1, 1, 4, 0, 1, 6, 6, 11, 0, 1, 19, 51, 23, 26, 0, 1, 109, 212, 269, 72, 57, 0, 1, 588, 1571, 1419, 1140, 201, 120, 0, 1, 4033, 10470, 13343, 7432, 4272, 522, 247, 0, 1, 29485, 87672, 107853, 87552, 33683, 14841, 1291, 502, 0, 1, 246042, 763612]

cp's OEIS Frontend

A097898 Triangle read by rows: T(n,k) is the number of permutations of [n] with k runs of length 1. For example, 457/3/26/1 has two runs of length 1: 3 and 1.

Table of values

List of values