A303868 - cp's OEIS frontend

A303868 Triangle read by rows: T(n,k) = number of noncrossing path sets on n nodes up to rotation and reflection with k paths and isolated vertices allowed.

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	1
7	2
8	3
9	2
10	1
11	3
12	7
13	6
14	2
15	1
16	6
17	20
18	23
19	11
20	3
21	1
22	10
23	50
24	80
25	51
26	17
27	3
28	1
29	20
30	136
31	285
32	252
33	109
34	26
35	4
36	1
37	36
38	346
39	966
40	1119
41	652
42	200
43	36
44	4
45	1
46	72
47	901
48	3188
49	4782
50	3623
51	1502
52	352
53	50
54	5
55	1
56	136
57	2264
58	10133
59	19116
60	18489
61	9949
62	3120
63	570
64	65
65	5
66	1

[1, 1, 1, 1, 1, 1, 2, 3, 2, 1, 3, 7, 6, 2, 1, 6, 20, 23, 11, 3, 1, 10, 50, 80, 51, 17, 3, 1, 20, 136, 285, 252, 109, 26, 4, 1, 36, 346, 966, 1119, 652, 200, 36, 4, 1, 72, 901, 3188, 4782, 3623, 1502, 352, 50, 5, 1, 136, 2264, 10133, 19116, 18489, 9949, 3120, 570, 65, 5, 1]

cp's OEIS Frontend

A303868 Triangle read by rows: T(n,k) = number of noncrossing path sets on n nodes up to rotation and reflection with k paths and isolated vertices allowed.

Table of values

List of values