A250261 - cp's OEIS frontend

A250261 Number A(n,k) of permutations p of [n] such that p(i) > p(i+1) iff i = 1 + k*m for some m >= 0; square array A(n,k), n>=0, k>=0, read by antidiagonals.

n	a(n)
0	1
1	1
2	1
3	1
4	1
5	1
6	1
7	1
8	1
9	2
10	1
11	1
12	1
13	1
14	3
15	1
16	1
17	1
18	2
19	1
20	4
21	1
22	1
23	1
24	2
25	5
26	1
27	5
28	1
29	1
30	1
31	2
32	3
33	16
34	1
35	6
36	1
37	1
38	1
39	2
40	3
41	11
42	61
43	1
44	7
45	1
46	1
47	1
48	2
49	3
50	4
51	40
52	272
53	1
54	8
55	1
56	1
57	1
58	2
59	3
60	4
61	19
62	99
63	1385
64	1
65	9
66	1
67	1
68	1
69	2
70	3
71	4
72	5
73	78
74	589
75	7936
76	1
77	10
78	1
79	1
80	1
81	2
82	3
83	4
84	5
85	29
86	217
87	3194
88	50521
89	1
90	11

[1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 3, 1, 1, 1, 2, 1, 4, 1, 1, 1, 2, 5, 1, 5, 1, 1, 1, 2, 3, 16, 1, 6, 1, 1, 1, 2, 3, 11, 61, 1, 7, 1, 1, 1, 2, 3, 4, 40, 272, 1, 8, 1, 1, 1, 2, 3, 4, 19, 99, 1385, 1, 9, 1, 1, 1, 2, 3, 4, 5, 78, 589, 7936, 1, 10, 1, 1, 1, 2, 3, 4, 5, 29, 217, 3194, 50521, 1, 11]

cp's OEIS Frontend

A250261 Number A(n,k) of permutations p of [n] such that p(i) > p(i+1) iff i = 1 + k*m for some m >= 0; square array A(n,k), n>=0, k>=0, read by antidiagonals.

Table of values

List of values