A368308 - cp's OEIS frontend

A368308 Table read by antidiagonals: T(n,k) is the number of tilings of the n X k torus up to 180-degree rotation by a tile that is not fixed under 180-degree rotation.

n	a(n)
1	1
2	2
3	2
4	2
5	5
6	2
7	4
8	9
9	9
10	4
11	4
12	26
13	32
14	26
15	4
16	9
17	62
18	192
19	192
20	62
21	9
22	10
23	205
24	1096
25	2174
26	1096
27	205
28	10
29	22
30	623
31	7440
32	26500
33	26500
34	7440
35	623
36	22
37	30
38	2171
39	49940
40	351336
41	671104
42	351336
43	49940
44	2171
45	30

[1, 2, 2, 2, 5, 2, 4, 9, 9, 4, 4, 26, 32, 26, 4, 9, 62, 192, 192, 62, 9, 10, 205, 1096, 2174, 1096, 205, 10, 22, 623, 7440, 26500, 26500, 7440, 623, 22, 30, 2171, 49940, 351336, 671104, 351336, 49940, 2171, 30]

cp's OEIS Frontend

A368308 Table read by antidiagonals: T(n,k) is the number of tilings of the n X k torus up to 180-degree rotation by a tile that is not fixed under 180-degree rotation.

Table of values

List of values