A133200 - cp's OEIS frontend

A133200 A001263 * A136521 as infinite lower triangular matrices, where A001263 = the Narayana triangle and A136521 = an infinite lower triangular matrix with (1, 2, 2, 2, ...) in the main diagonal and the rest zeros.

n	a(n)
1	1
2	1
3	2
4	1
5	6
6	2
7	1
8	12
9	12
10	2
11	1
12	20
13	40
14	20
15	2
16	1
17	30
18	100
19	100
20	30
21	2
22	1
23	42
24	210
25	350
26	210
27	42
28	2
29	1
30	56
31	392
32	980
33	980
34	392
35	56
36	2
37	1
38	72
39	672
40	2352
41	3528
42	2352
43	672
44	72
45	2
46	1
47	90
48	1080
49	5040
50	10584
51	10584
52	5040
53	1080
54	90
55	2

[1, 1, 2, 1, 6, 2, 1, 12, 12, 2, 1, 20, 40, 20, 2, 1, 30, 100, 100, 30, 2, 1, 42, 210, 350, 210, 42, 2, 1, 56, 392, 980, 980, 392, 56, 2, 1, 72, 672, 2352, 3528, 2352, 672, 72, 2, 1, 90, 1080, 5040, 10584, 10584, 5040, 1080, 90, 2]

cp's OEIS Frontend

A133200 A001263 * A136521 as infinite lower triangular matrices, where A001263 = the Narayana triangle and A136521 = an infinite lower triangular matrix with (1, 2, 2, 2, ...) in the main diagonal and the rest zeros.

Table of values

List of values