A361954 - cp's OEIS frontend

A361954 Triangle read by rows: T(n,k) is the number of unlabeled connected weakly graded (ranked) posets with n elements and rank k.

n	a(n)
1	1
2	0
3	1
4	0
5	2
6	1
7	0
8	4
9	5
10	1
11	0
12	10
13	23
14	8
15	1
16	0
17	27
18	107
19	56
20	11
21	1
22	0
23	88
24	557
25	388
26	98
27	14
28	1
29	0
30	328
31	3271
32	2888
33	839
34	149
35	17
36	1
37	0
38	1460
39	22424
40	23900
41	7512
42	1470
43	209
44	20
45	1
46	0
47	7799
48	183273
49	226807
50	73405
51	14715
52	2308
53	278
54	23
55	1

[1, 0, 1, 0, 2, 1, 0, 4, 5, 1, 0, 10, 23, 8, 1, 0, 27, 107, 56, 11, 1, 0, 88, 557, 388, 98, 14, 1, 0, 328, 3271, 2888, 839, 149, 17, 1, 0, 1460, 22424, 23900, 7512, 1470, 209, 20, 1, 0, 7799, 183273, 226807, 73405, 14715, 2308, 278, 23, 1]

cp's OEIS Frontend

A361954 Triangle read by rows: T(n,k) is the number of unlabeled connected weakly graded (ranked) posets with n elements and rank k.

Table of values

List of values