A361239 - cp's OEIS frontend

A361239 Array read by antidiagonals: T(n,k) is the number of noncrossing k-gonal cacti with n polygons up to rotation and reflection.

n	a(n)
0	1
1	1
2	1
3	1
4	1
5	1
6	1
7	1
8	1
9	1
10	1
11	1
12	1
13	3
14	1
15	1
16	1
17	1
18	4
19	7
20	1
21	1
22	1
23	1
24	6
25	19
26	28
27	1
28	1
29	1
30	1
31	7
32	35
33	124
34	108
35	1
36	1
37	1
38	1
39	9
40	57
41	349
42	931
43	507
44	1
45	1
46	1
47	1
48	10
49	85
50	737
51	3766
52	7801
53	2431
54	1
55	1
56	1
57	1
58	12
59	117
60	1359
61	10601
62	45632
63	68685
64	12441
65	1

[1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 1, 1, 1, 1, 4, 7, 1, 1, 1, 1, 6, 19, 28, 1, 1, 1, 1, 7, 35, 124, 108, 1, 1, 1, 1, 9, 57, 349, 931, 507, 1, 1, 1, 1, 10, 85, 737, 3766, 7801, 2431, 1, 1, 1, 1, 12, 117, 1359, 10601, 45632, 68685, 12441, 1]

cp's OEIS Frontend

A361239 Array read by antidiagonals: T(n,k) is the number of noncrossing k-gonal cacti with n polygons up to rotation and reflection.

Table of values

List of values