A238556 - cp's OEIS frontend

A238556 Number T(n,k) of equivalence classes of ways of placing k 3 X 3 tiles in an n X 7 rectangle under all symmetry operations of the rectangle; irregular triangle T(n,k), n>=3, 0<=k<=2*floor(n/3), read by rows.

n	a(n)
3	1
4	3
5	2
6	1
7	3
8	4
9	1
10	6
11	9
12	1
13	6
14	21
15	13
16	4
17	1
18	9
19	39
20	53
21	23
22	1
23	9
24	64
25	128
26	87
27	1
28	12
29	95
30	283
31	311
32	91
33	10
34	1
35	12
36	133
37	521
38	891
39	543
40	106
41	1
42	15
43	177
44	917
45	2118
46	2030
47	646
48	1
49	15
50	228
51	1444
52	4424
53	6000
54	3295
55	456
56	25
57	1
58	18
59	285
60	2207
61	8408
62	15484
63	13106
64	4322
65	473

[1, 3, 2, 1, 3, 4, 1, 6, 9, 1, 6, 21, 13, 4, 1, 9, 39, 53, 23, 1, 9, 64, 128, 87, 1, 12, 95, 283, 311, 91, 10, 1, 12, 133, 521, 891, 543, 106, 1, 15, 177, 917, 2118, 2030, 646, 1, 15, 228, 1444, 4424, 6000, 3295, 456, 25, 1, 18, 285, 2207, 8408, 15484, 13106, 4322, 473]

cp's OEIS Frontend

A238556 Number T(n,k) of equivalence classes of ways of placing k 3 X 3 tiles in an n X 7 rectangle under all symmetry operations of the rectangle; irregular triangle T(n,k), n>=3, 0<=k<=2*floor(n/3), read by rows.

Table of values

List of values