A225624 - cp's OEIS frontend

A225624 Triangle read by rows: T(n,k) is the number of descent sequences of length n with exactly k-1 descents, n>=1, 1<=k<=n.

n	a(n)
1	1
2	2
3	0
4	3
5	1
6	0
7	4
8	5
9	0
10	0
11	5
12	15
13	3
14	0
15	0
16	6
17	35
18	25
19	1
20	0
21	0
22	7
23	70
24	117
25	28
26	0
27	0
28	0
29	8
30	126
31	405
32	271
33	22
34	0
35	0
36	0
37	9
38	210
39	1155
40	1631
41	483
42	13
43	0
44	0
45	0
46	10
47	330
48	2871
49	7359
50	5126
51	711
52	5
53	0
54	0
55	0
56	11
57	495
58	6435
59	27223
60	36526
61	13482
62	889
63	1
64	0
65	0
66	0
67	12
68	715
69	13299
70	86919
71	199924
72	151276
73	30906
74	962
75	0
76	0
77	0
78	0

[1, 2, 0, 3, 1, 0, 4, 5, 0, 0, 5, 15, 3, 0, 0, 6, 35, 25, 1, 0, 0, 7, 70, 117, 28, 0, 0, 0, 8, 126, 405, 271, 22, 0, 0, 0, 9, 210, 1155, 1631, 483, 13, 0, 0, 0, 10, 330, 2871, 7359, 5126, 711, 5, 0, 0, 0, 11, 495, 6435, 27223, 36526, 13482, 889, 1, 0, 0, 0, 12, 715, 13299, 86919, 199924, 151276, 30906, 962, 0, 0, 0, 0]

cp's OEIS Frontend

A225624 Triangle read by rows: T(n,k) is the number of descent sequences of length n with exactly k-1 descents, n>=1, 1<=k<=n.

Table of values

List of values