A238125 - cp's OEIS frontend

A238125 Triangle read by rows: T(n,k) gives the number of ballot sequences of length n having exactly k flat steps, n>=0, 0<=k<=n.

n	a(n)
0	1
1	1
2	0
3	1
4	1
5	0
6	2
7	1
8	1
9	0
10	4
11	3
12	2
13	1
14	0
15	9
16	8
17	6
18	2
19	1
20	0
21	22
22	24
23	17
24	9
25	3
26	1
27	0
28	59
29	70
30	57
31	29
32	13
33	3
34	1
35	0
36	170
37	224
38	191
39	108
40	49
41	17
42	4
43	1
44	0
45	516
46	744
47	663
48	399
49	201
50	69
51	23
52	4
53	1
54	0
55	1658
56	2588
57	2415
58	1573
59	802
60	322
61	104
62	28
63	5
64	1
65	0
66	5583
67	9317
68	9108
69	6249
70	3343
71	1408
72	510
73	137
74	35
75	5
76	1
77	0

[1, 1, 0, 1, 1, 0, 2, 1, 1, 0, 4, 3, 2, 1, 0, 9, 8, 6, 2, 1, 0, 22, 24, 17, 9, 3, 1, 0, 59, 70, 57, 29, 13, 3, 1, 0, 170, 224, 191, 108, 49, 17, 4, 1, 0, 516, 744, 663, 399, 201, 69, 23, 4, 1, 0, 1658, 2588, 2415, 1573, 802, 322, 104, 28, 5, 1, 0, 5583, 9317, 9108, 6249, 3343, 1408, 510, 137, 35, 5, 1, 0]

cp's OEIS Frontend

A238125 Triangle read by rows: T(n,k) gives the number of ballot sequences of length n having exactly k flat steps, n>=0, 0<=k<=n.

Table of values

List of values