A263859 - cp's OEIS frontend

A263859 Triangle read by rows: T(n,k) (n>=1, k>=0) is the number of posets with n elements and rank k (or depth k+1).

n	a(n)
1	1
2	1
3	1
4	1
5	3
6	1
7	1
8	8
9	6
10	1
11	1
12	20
13	31
14	10
15	1
16	1
17	55
18	162
19	84
20	15
21	1
22	1
23	163
24	940
25	734
26	185
27	21
28	1
29	1
30	556
31	6372
32	7305
33	2380
34	356
35	28
36	1
37	1
38	2222
39	52336
40	86683
41	35070
42	6259
43	623
44	36
45	1
46	1
47	10765
48	534741
49	1261371
50	619489
51	125597
52	14258
53	1016
54	45
55	1

[1, 1, 1, 1, 3, 1, 1, 8, 6, 1, 1, 20, 31, 10, 1, 1, 55, 162, 84, 15, 1, 1, 163, 940, 734, 185, 21, 1, 1, 556, 6372, 7305, 2380, 356, 28, 1, 1, 2222, 52336, 86683, 35070, 6259, 623, 36, 1, 1, 10765, 534741, 1261371, 619489, 125597, 14258, 1016, 45, 1]

cp's OEIS Frontend

A263859 Triangle read by rows: T(n,k) (n>=1, k>=0) is the number of posets with n elements and rank k (or depth k+1).

Table of values

List of values