A001263 - cp's OEIS frontend

A001263 Triangle of Narayana numbers T(n,k) = C(n-1,k-1)*C(n,k-1)/k with 1 <= k <= n, read by rows. Also called the Catalan triangle.

n	a(n)
1	1
2	1
3	1
4	1
5	3
6	1
7	1
8	6
9	6
10	1
11	1
12	10
13	20
14	10
15	1
16	1
17	15
18	50
19	50
20	15
21	1
22	1
23	21
24	105
25	175
26	105
27	21
28	1
29	1
30	28
31	196
32	490
33	490
34	196
35	28
36	1
37	1
38	36
39	336
40	1176
41	1764
42	1176
43	336
44	36
45	1
46	1
47	45
48	540
49	2520
50	5292
51	5292
52	2520
53	540
54	45
55	1
56	1
57	55
58	825
59	4950
60	13860
61	19404
62	13860
63	4950
64	825

[1, 1, 1, 1, 3, 1, 1, 6, 6, 1, 1, 10, 20, 10, 1, 1, 15, 50, 50, 15, 1, 1, 21, 105, 175, 105, 21, 1, 1, 28, 196, 490, 490, 196, 28, 1, 1, 36, 336, 1176, 1764, 1176, 336, 36, 1, 1, 45, 540, 2520, 5292, 5292, 2520, 540, 45, 1, 1, 55, 825, 4950, 13860, 19404, 13860, 4950, 825]

cp's OEIS Frontend

A001263 Triangle of Narayana numbers T(n,k) = C(n-1,k-1)*C(n,k-1)/k with 1 <= k <= n, read by rows. Also called the Catalan triangle.

Table of values

List of values