A238557 - cp's OEIS frontend

A238557 Number T(n,k) of equivalence classes of ways of placing k 2 X 2 tiles in an n X 8 rectangle under all symmetry operations of the rectangle; irregular triangle T(n,k), n>=2, 0<=k<=4*floor(n/2), read by rows.

n	a(n)
2	1
3	4
4	9
5	6
6	1
7	1
8	4
9	18
10	22
11	6
12	1
13	8
14	49
15	139
16	204
17	145
18	54
19	8
20	1
21	1
22	8
23	83
24	392
25	1056
26	1438
27	956
28	240
29	25
30	1
31	12
32	139
33	927
34	3731
35	8772
36	12069
37	9506
38	4366
39	1160
40	179
41	16
42	1
43	1
44	12
45	198
46	1742
47	9748
48	33644
49	73274
50	98779
51	80661
52	37886
53	9679
54	1258
55	72

[1, 4, 9, 6, 1, 1, 4, 18, 22, 6, 1, 8, 49, 139, 204, 145, 54, 8, 1, 1, 8, 83, 392, 1056, 1438, 956, 240, 25, 1, 12, 139, 927, 3731, 8772, 12069, 9506, 4366, 1160, 179, 16, 1, 1, 12, 198, 1742, 9748, 33644, 73274, 98779, 80661, 37886, 9679, 1258, 72]

cp's OEIS Frontend

A238557 Number T(n,k) of equivalence classes of ways of placing k 2 X 2 tiles in an n X 8 rectangle under all symmetry operations of the rectangle; irregular triangle T(n,k), n>=2, 0<=k<=4*floor(n/2), read by rows.

Table of values

List of values