A368500 - cp's OEIS frontend

A368500 Table read by rows: T(n, k) is the number of permutations of size n whose incidence graph has treewidth k.

n	a(n)
1	1
2	0
3	2
4	0
5	2
6	4
7	0
8	2
9	20
10	2
11	0
12	2
13	76
14	42
15	0
16	2
17	252
18	466
19	0
20	2
21	788
22	4110
23	140
24	0
25	2
26	2374
27	32388
28	5556
29	0
30	2
31	6938
32	236966
33	118974
34	0
35	2
36	19778
37	1652490
38	1952530
39	4000
40	0
41	2
42	55222
43	11173264
44	28078784
45	609528
46	0
47	2
48	151462
49	74003396
50	370327224
51	34519516

[1, 0, 2, 0, 2, 4, 0, 2, 20, 2, 0, 2, 76, 42, 0, 2, 252, 466, 0, 2, 788, 4110, 140, 0, 2, 2374, 32388, 5556, 0, 2, 6938, 236966, 118974, 0, 2, 19778, 1652490, 1952530, 4000, 0, 2, 55222, 11173264, 28078784, 609528, 0, 2, 151462, 74003396, 370327224, 34519516]

cp's OEIS Frontend

A368500 Table read by rows: T(n, k) is the number of permutations of size n whose incidence graph has treewidth k.

Table of values

List of values