A238123 - cp's OEIS frontend

A238123 Triangle read by rows: T(n,k) gives the number of ballot sequences of length n having k largest parts, n >= k >= 0.

n	a(n)
0	1
1	0
2	1
3	0
4	1
5	1
6	0
7	3
8	0
9	1
10	0
11	7
12	2
13	0
14	1
15	0
16	20
17	5
18	0
19	0
20	1
21	0
22	56
23	14
24	5
25	0
26	0
27	1
28	0
29	182
30	35
31	14
32	0
33	0
34	0
35	1
36	0
37	589
38	132
39	28
40	14
41	0
42	0
43	0
44	1
45	0
46	2088
47	399
48	90
49	42
50	0
51	0
52	0
53	0
54	1
55	0
56	7522
57	1556
58	285
59	90
60	42
61	0
62	0
63	0
64	0
65	1
66	0
67	28820
68	5346
69	1232
70	165
71	132
72	0
73	0
74	0
75	0
76	0
77	1

[1, 0, 1, 0, 1, 1, 0, 3, 0, 1, 0, 7, 2, 0, 1, 0, 20, 5, 0, 0, 1, 0, 56, 14, 5, 0, 0, 1, 0, 182, 35, 14, 0, 0, 0, 1, 0, 589, 132, 28, 14, 0, 0, 0, 1, 0, 2088, 399, 90, 42, 0, 0, 0, 0, 1, 0, 7522, 1556, 285, 90, 42, 0, 0, 0, 0, 1, 0, 28820, 5346, 1232, 165, 132, 0, 0, 0, 0, 0, 1]

cp's OEIS Frontend

A238123 Triangle read by rows: T(n,k) gives the number of ballot sequences of length n having k largest parts, n >= k >= 0.

Table of values

List of values