A202181 - cp's OEIS frontend

A202181 Triangle read by rows: T(n,k) = number of n-element unlabeled N-free posets of height k (1 <= k <= n).

n	a(n)
1	1
2	1
3	1
4	1
5	3
6	1
7	1
8	7
9	6
10	1
11	1
12	13
13	24
14	10
15	1
16	1
17	25
18	77
19	61
20	15
21	1
22	1
23	43
24	228
25	291
26	130
27	21
28	1
29	1
30	76
31	644
32	1229
33	856
34	246
35	28
36	1
37	1
38	128
39	1776
40	4872
41	4840
42	2136
43	427
44	36
45	1
46	1
47	216
48	4854
49	18711
50	25107
51	15543
52	4733
53	694
54	45
55	1
56	1
57	354
58	13184
59	70858
60	124167
61	101538
62	43120
63	9577
64	1071
65	55
66	1

[1, 1, 1, 1, 3, 1, 1, 7, 6, 1, 1, 13, 24, 10, 1, 1, 25, 77, 61, 15, 1, 1, 43, 228, 291, 130, 21, 1, 1, 76, 644, 1229, 856, 246, 28, 1, 1, 128, 1776, 4872, 4840, 2136, 427, 36, 1, 1, 216, 4854, 18711, 25107, 15543, 4733, 694, 45, 1, 1, 354, 13184, 70858, 124167, 101538, 43120, 9577, 1071, 55, 1]

cp's OEIS Frontend

A202181 Triangle read by rows: T(n,k) = number of n-element unlabeled N-free posets of height k (1 <= k <= n).

Table of values

List of values