A354615 - cp's OEIS frontend

A354615 Triangular array read by rows: T(n,k) is the number of labeled posets on [n] that are composed of exactly k irreducible posets, n >= 0, 0 <= k <= n.

n	a(n)
0	1
1	0
2	1
3	0
4	1
5	2
6	0
7	7
8	6
9	6
10	0
11	97
12	62
13	36
14	24
15	0
16	2251
17	1110
18	510
19	240
20	120
21	0
22	80821
23	30902
24	11340
25	4440
26	1800
27	720
28	0
29	4305127
30	1273566
31	369726
32	119280
33	42000
34	15120
35	5040
36	0
37	332273257
38	75831422
39	17192196
40	4476024
41	1335600
42	433440
43	141120
44	40320

[1, 0, 1, 0, 1, 2, 0, 7, 6, 6, 0, 97, 62, 36, 24, 0, 2251, 1110, 510, 240, 120, 0, 80821, 30902, 11340, 4440, 1800, 720, 0, 4305127, 1273566, 369726, 119280, 42000, 15120, 5040, 0, 332273257, 75831422, 17192196, 4476024, 1335600, 433440, 141120, 40320]

cp's OEIS Frontend

A354615 Triangular array read by rows: T(n,k) is the number of labeled posets on [n] that are composed of exactly k irreducible posets, n >= 0, 0 <= k <= n.

Table of values

List of values