A221494 - cp's OEIS frontend

A221494 Table read by downward diagonals: T(n,k) = number of skeleta of (3+1)-free posets with n clone sets and k tangles.

n	a(n)
0	1
1	1
2	1
3	3
4	5
5	1
6	12
7	28
8	16
9	2
10	55
11	165
12	152
13	47
14	4
15	273
16	1001
17	1265
18	658
19	136
20	9
21	1428
22	6188
23	9919
24	7315
25	2547
26	392
27	21
28	7752
29	38760
30	75208
31	71981
32	35975
33	9252
34	1130
35	51
36	43263
37	245157
38	558144
39	657356
40	431599
41	159701
42	32286
43	3262
44	127
45	246675
46	1562275

[1, 1, 1, 3, 5, 1, 12, 28, 16, 2, 55, 165, 152, 47, 4, 273, 1001, 1265, 658, 136, 9, 1428, 6188, 9919, 7315, 2547, 392, 21, 7752, 38760, 75208, 71981, 35975, 9252, 1130, 51, 43263, 245157, 558144, 657356, 431599, 159701, 32286, 3262, 127, 246675, 1562275]

cp's OEIS Frontend

A221494 Table read by downward diagonals: T(n,k) = number of skeleta of (3+1)-free posets with n clone sets and k tangles.

Table of values

List of values