A361953 - cp's OEIS frontend

A361953 Triangle read by rows: T(n,k) is the number of unlabeled weakly graded (ranked) posets with n elements and rank k.

n	a(n)
0	1
1	0
2	1
3	0
4	1
5	1
6	0
7	1
8	3
9	1
10	0
11	1
12	8
13	6
14	1
15	0
16	1
17	20
18	30
19	9
20	1
21	0
22	1
23	55
24	145
25	66
26	12
27	1
28	0
29	1
30	163
31	745
32	465
33	111
34	15
35	1
36	0
37	1
38	556
39	4245
40	3444
41	964
42	165
43	18
44	1
45	0
46	1
47	2222
48	27880
49	28024
50	8618
51	1652
52	228
53	21
54	1
55	0
56	1
57	10765
58	218058
59	259974
60	83322
61	16569
62	2556
63	300
64	24
65	1

[1, 0, 1, 0, 1, 1, 0, 1, 3, 1, 0, 1, 8, 6, 1, 0, 1, 20, 30, 9, 1, 0, 1, 55, 145, 66, 12, 1, 0, 1, 163, 745, 465, 111, 15, 1, 0, 1, 556, 4245, 3444, 964, 165, 18, 1, 0, 1, 2222, 27880, 28024, 8618, 1652, 228, 21, 1, 0, 1, 10765, 218058, 259974, 83322, 16569, 2556, 300, 24, 1]

cp's OEIS Frontend

A361953 Triangle read by rows: T(n,k) is the number of unlabeled weakly graded (ranked) posets with n elements and rank k.

Table of values

List of values