A300260 - cp's OEIS frontend

A300260 Table read by antidiagonals: T(n,k) is the number of unlabeled rank-3 graded lattices with n coatoms and k atoms (for n,k >= 1).

n	a(n)
1	1
2	1
3	1
4	1
5	2
6	1
7	1
8	3
9	3
10	1
11	1
12	4
13	8
14	4
15	1
16	1
17	5
18	13
19	13
20	5
21	1
22	1
23	6
24	20
25	34
26	20
27	6
28	1
29	1
30	7
31	29
32	68
33	68
34	29
35	7
36	1
37	1
38	8
39	39
40	121
41	190
42	121
43	39
44	8
45	1
46	1
47	9
48	50
49	197
50	441
51	441
52	197
53	50
54	9
55	1
56	1
57	10
58	64
59	299
60	907
61	1384
62	907
63	299
64	64
65	10
66	1

[1, 1, 1, 1, 2, 1, 1, 3, 3, 1, 1, 4, 8, 4, 1, 1, 5, 13, 13, 5, 1, 1, 6, 20, 34, 20, 6, 1, 1, 7, 29, 68, 68, 29, 7, 1, 1, 8, 39, 121, 190, 121, 39, 8, 1, 1, 9, 50, 197, 441, 441, 197, 50, 9, 1, 1, 10, 64, 299, 907, 1384, 907, 299, 64, 10, 1]

cp's OEIS Frontend

A300260 Table read by antidiagonals: T(n,k) is the number of unlabeled rank-3 graded lattices with n coatoms and k atoms (for n,k >= 1).

Table of values

List of values