A303912 - cp's OEIS frontend

A303912 Array read by antidiagonals: T(n,k) is the number of (planar) unlabeled k-ary cacti having n polygons.

n	a(n)
0	1
1	1
2	1
3	1
4	1
5	1
6	1
7	1
8	2
9	1
10	1
11	1
12	3
13	3
14	1
15	1
16	1
17	4
18	6
19	6
20	1
21	1
22	1
23	5
24	10
25	19
26	10
27	1
28	1
29	1
30	6
31	15
32	44
33	57
34	28
35	1
36	1
37	1
38	7
39	21
40	85
41	197
42	258
43	63
44	1
45	1
46	1
47	8
48	28
49	146
50	510
51	1228
52	1110
53	190
54	1
55	1
56	1
57	9
58	36
59	231
60	1101
61	4051
62	7692
63	5475
64	546
65	1
66	1
67	1
68	10
69	45
70	344
71	2100
72	10632
73	33130
74	52828
75	27429
76	1708
77	1

[1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 3, 3, 1, 1, 1, 4, 6, 6, 1, 1, 1, 5, 10, 19, 10, 1, 1, 1, 6, 15, 44, 57, 28, 1, 1, 1, 7, 21, 85, 197, 258, 63, 1, 1, 1, 8, 28, 146, 510, 1228, 1110, 190, 1, 1, 1, 9, 36, 231, 1101, 4051, 7692, 5475, 546, 1, 1, 1, 10, 45, 344, 2100, 10632, 33130, 52828, 27429, 1708, 1]

cp's OEIS Frontend

A303912 Array read by antidiagonals: T(n,k) is the number of (planar) unlabeled k-ary cacti having n polygons.

Table of values

List of values