A080159 - cp's OEIS frontend

A080159 Triangular array of ways of drawing k non-intersecting chords between n points on a circle; i.e., Motzkin polynomial coefficients.

n	a(n)
0	1
1	1
2	0
3	1
4	1
5	0
6	1
7	3
8	0
9	0
10	1
11	6
12	2
13	0
14	0
15	1
16	10
17	10
18	0
19	0
20	0
21	1
22	15
23	30
24	5
25	0
26	0
27	0
28	1
29	21
30	70
31	35
32	0
33	0
34	0
35	0
36	1
37	28
38	140
39	140
40	14
41	0
42	0
43	0
44	0
45	1
46	36
47	252
48	420
49	126
50	0
51	0
52	0
53	0
54	0
55	1
56	45
57	420
58	1050
59	630
60	42
61	0
62	0
63	0
64	0
65	0
66	1
67	55
68	660
69	2310
70	2310
71	462
72	0
73	0
74	0
75	0
76	0
77	0
78	1
79	66
80	990
81	4620

[1, 1, 0, 1, 1, 0, 1, 3, 0, 0, 1, 6, 2, 0, 0, 1, 10, 10, 0, 0, 0, 1, 15, 30, 5, 0, 0, 0, 1, 21, 70, 35, 0, 0, 0, 0, 1, 28, 140, 140, 14, 0, 0, 0, 0, 1, 36, 252, 420, 126, 0, 0, 0, 0, 0, 1, 45, 420, 1050, 630, 42, 0, 0, 0, 0, 0, 1, 55, 660, 2310, 2310, 462, 0, 0, 0, 0, 0, 0, 1, 66, 990, 4620]

cp's OEIS Frontend

A080159 Triangular array of ways of drawing k non-intersecting chords between n points on a circle; i.e., Motzkin polynomial coefficients.

Table of values

List of values