A238189 - cp's OEIS frontend

A238189 Number T(n,k) of equivalence classes of ways of placing k 2 X 2 tiles in an n X 4 rectangle under all symmetry operations of the rectangle; irregular triangle T(n,k), n>=2, 0<=k<=n-n%2, read by rows.

n	a(n)
2	1
3	2
4	1
5	1
6	2
7	2
8	1
9	4
10	7
11	3
12	1
13	1
14	4
15	13
16	10
17	4
18	1
19	6
20	23
21	33
22	22
23	6
24	1
25	1
26	6
27	34
28	68
29	72
30	30
31	6
32	1
33	8
34	49
35	139
36	204
37	145
38	54
39	8
40	1
41	1
42	8
43	65
44	230
45	467
46	476
47	269
48	70
49	9
50	1
51	10
52	85
53	377
54	961
55	1348
56	1080
57	472
58	111
59	12
60	1
61	1
62	10
63	106
64	552
65	1767
66	3188
67	3454
68	2156

[1, 2, 1, 1, 2, 2, 1, 4, 7, 3, 1, 1, 4, 13, 10, 4, 1, 6, 23, 33, 22, 6, 1, 1, 6, 34, 68, 72, 30, 6, 1, 8, 49, 139, 204, 145, 54, 8, 1, 1, 8, 65, 230, 467, 476, 269, 70, 9, 1, 10, 85, 377, 961, 1348, 1080, 472, 111, 12, 1, 1, 10, 106, 552, 1767, 3188, 3454, 2156]

cp's OEIS Frontend

A238189 Number T(n,k) of equivalence classes of ways of placing k 2 X 2 tiles in an n X 4 rectangle under all symmetry operations of the rectangle; irregular triangle T(n,k), n>=2, 0<=k<=n-n%2, read by rows.

Table of values

List of values