A322598 - cp's OEIS frontend

A322598 a(n) is the number of unlabeled rank-3 graded lattices with 3 coatoms and n atoms.

n	a(n)
1	1
2	3
3	8
4	13
5	20
6	29
7	39
8	50
9	64
10	78
11	94
12	112
13	131
14	151
15	174
16	197
17	222
18	249
19	277
20	306
21	338
22	370
23	404
24	440
25	477
26	515
27	556
28	597
29	640
30	685
31	731
32	778
33	828
34	878
35	930
36	984
37	1039
38	1095
39	1154
40	1213
41	1274
42	1337
43	1401
44	1466
45	1534
46	1602
47	1672
48	1744
49	1817

[1, 3, 8, 13, 20, 29, 39, 50, 64, 78, 94, 112, 131, 151, 174, 197, 222, 249, 277, 306, 338, 370, 404, 440, 477, 515, 556, 597, 640, 685, 731, 778, 828, 878, 930, 984, 1039, 1095, 1154, 1213, 1274, 1337, 1401, 1466, 1534, 1602, 1672, 1744, 1817]

cp's OEIS Frontend

A322598 a(n) is the number of unlabeled rank-3 graded lattices with 3 coatoms and n atoms.

Table of values

List of values