A238555 - cp's OEIS frontend

A238555 Number T(n,k) of equivalence classes of ways of placing k 2 X 2 tiles in an n X 7 rectangle under all symmetry operations of the rectangle; irregular triangle T(n,k), n>=2, 0<=k<=3*floor(n/2), read by rows.

n	a(n)
2	1
3	3
4	6
5	2
6	1
7	3
8	12
9	8
10	1
11	6
12	34
13	68
14	72
15	30
16	6
17	1
18	6
19	58
20	206
21	403
22	336
23	106
24	1
25	9
26	98
27	509
28	1551
29	2505
30	2196
31	971
32	219
33	20
34	1
35	9
36	140
37	980
38	4248
39	10592
40	15614
41	12876
42	5462
43	900
44	1
45	12
46	198
47	1742
48	9748
49	33644
50	73274
51	98779
52	80661
53	37886
54	9679
55	1258
56	72

[1, 3, 6, 2, 1, 3, 12, 8, 1, 6, 34, 68, 72, 30, 6, 1, 6, 58, 206, 403, 336, 106, 1, 9, 98, 509, 1551, 2505, 2196, 971, 219, 20, 1, 9, 140, 980, 4248, 10592, 15614, 12876, 5462, 900, 1, 12, 198, 1742, 9748, 33644, 73274, 98779, 80661, 37886, 9679, 1258, 72]

cp's OEIS Frontend

A238555 Number T(n,k) of equivalence classes of ways of placing k 2 X 2 tiles in an n X 7 rectangle under all symmetry operations of the rectangle; irregular triangle T(n,k), n>=2, 0<=k<=3*floor(n/2), read by rows.

Table of values

List of values