A381706 - cp's OEIS frontend

A381706 Three-dimensional array of the number b(n, k, i) of permutations of k chosen numbers in {1,2,...,n} with i-1 descents, n >= 1, 1 <= k <= n, 1 <= i <= n.

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	1
7	1
8	1
9	1
10	4
11	1
12	1
13	4
14	1
15	1
16	1
17	1
18	1
19	1
20	5
21	5
22	1
23	1
24	11
25	11
26	1
27	1
28	11
29	11
30	1
31	1
32	1
33	1
34	1
35	1
36	1
37	6
38	6
39	6
40	1
41	1
42	16
43	26
44	16
45	1
46	1
47	26
48	66
49	26
50	1
51	1
52	26
53	66
54	26
55	1
56	1
57	1
58	1
59	1
60	1
61	1
62	1
63	7
64	7
65	7
66	7
67	1
68	1
69	22
70	37
71	37
72	22
73	1
74	1
75	42
76	137
77	137
78	42
79	1

[1, 1, 1, 1, 1, 1, 1, 1, 1, 4, 1, 1, 4, 1, 1, 1, 1, 1, 1, 5, 5, 1, 1, 11, 11, 1, 1, 11, 11, 1, 1, 1, 1, 1, 1, 1, 6, 6, 6, 1, 1, 16, 26, 16, 1, 1, 26, 66, 26, 1, 1, 26, 66, 26, 1, 1, 1, 1, 1, 1, 1, 1, 7, 7, 7, 7, 1, 1, 22, 37, 37, 22, 1, 1, 42, 137, 137, 42, 1]

cp's OEIS Frontend

A381706 Three-dimensional array of the number b(n, k, i) of permutations of k chosen numbers in {1,2,...,n} with i-1 descents, n >= 1, 1 <= k <= n, 1 <= i <= n.

Table of values

List of values

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	1
7	1
8	1
9	1
10	4
11	1
12	1
13	4
14	1
15	1
16	1
17	1
18	1
19	1
20	5
21	5
22	1
23	1
24	11
25	11
26	1
27	1
28	11
29	11
30	1
31	1
32	1
33	1
34	1
35	1
36	1
37	6
38	6
39	6
40	1
41	1
42	16
43	26
44	16
45	1
46	1
47	26
48	66
49	26
50	1
51	1
52	26
53	66
54	26
55	1
56	1
57	1
58	1
59	1
60	1
61	1
62	1
63	7
64	7
65	7
66	7
67	1
68	1
69	22
70	37
71	37
72	22
73	1
74	1
75	42
76	137
77	137
78	42
79	1

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	1
7	1
8	1
9	1
10	4
11	1
12	1
13	4
14	1
15	1
16	1
17	1
18	1
19	1
20	5
21	5
22	1
23	1
24	11
25	11
26	1
27	1
28	11
29	11
30	1
31	1
32	1
33	1
34	1
35	1
36	1
37	6
38	6
39	6
40	1
41	1
42	16
43	26
44	16
45	1
46	1
47	26
48	66
49	26
50	1
51	1
52	26
53	66
54	26
55	1
56	1
57	1
58	1
59	1
60	1
61	1
62	1
63	7
64	7
65	7
66	7
67	1
68	1
69	22
70	37
71	37
72	22
73	1
74	1
75	42
76	137
77	137
78	42
79	1

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	1
7	1
8	1
9	1
10	4
11	1
12	1
13	4
14	1
15	1
16	1
17	1
18	1
19	1
20	5
21	5
22	1
23	1
24	11
25	11
26	1
27	1
28	11
29	11
30	1
31	1
32	1
33	1
34	1
35	1
36	1
37	6
38	6
39	6
40	1
41	1
42	16
43	26
44	16
45	1
46	1
47	26
48	66
49	26
50	1
51	1
52	26
53	66
54	26
55	1
56	1
57	1
58	1
59	1
60	1
61	1
62	1
63	7
64	7
65	7
66	7
67	1
68	1
69	22
70	37
71	37
72	22
73	1
74	1
75	42
76	137
77	137
78	42
79	1