A342589 - cp's OEIS frontend

A342589 T(n,k) is the number of posets of n labeled elements with k covering relations (n>=1, k>=0). Triangle read by rows.

n	a(n)
1	1
2	1
3	2
4	1
5	6
6	12
7	1
8	12
9	60
10	128
11	18
12	1
13	20
14	180
15	880
16	2090
17	960
18	100
19	1
20	30
21	420
22	3480
23	17550
24	47772
25	43920
26	15000
27	1710
28	140
29	1
30	42
31	840
32	10360
33	84630
34	452004
35	1428868
36	2094960
37	1465170
38	491540
39	90594
40	10080
41	770

[1, 1, 2, 1, 6, 12, 1, 12, 60, 128, 18, 1, 20, 180, 880, 2090, 960, 100, 1, 30, 420, 3480, 17550, 47772, 43920, 15000, 1710, 140, 1, 42, 840, 10360, 84630, 452004, 1428868, 2094960, 1465170, 491540, 90594, 10080, 770]

cp's OEIS Frontend

A342589 T(n,k) is the number of posets of n labeled elements with k covering relations (n>=1, k>=0). Triangle read by rows.

Table of values

List of values