A231473 - cp's OEIS frontend

A231473 Number T(n,k) of equivalence classes of ways of placing k 3 X 3 tiles in an n X 5 rectangle under all symmetry operations of the rectangle; irregular triangle T(n,k), n>=3, 0<=k<=floor(n/3), read by rows.

n	a(n)
3	1
4	2
5	1
6	2
7	1
8	4
9	1
10	4
11	4
12	1
13	6
14	9
15	1
16	6
17	18
18	1
19	8
20	28
21	10
22	1
23	8
24	42
25	28
26	1
27	10
28	57
29	76
30	1
31	10
32	76
33	140
34	25
35	1
36	12
37	96
38	254
39	107
40	1
41	12
42	120
43	392
44	321
45	1
46	14
47	145
48	600
49	731
50	70
51	1
52	14
53	174
54	840
55	1462
56	366
57	1
58	16
59	204
60	1170
61	2610
62	1308
63	1
64	16
65	238
66	1540
67	4350
68	3416
69	196

[1, 2, 1, 2, 1, 4, 1, 4, 4, 1, 6, 9, 1, 6, 18, 1, 8, 28, 10, 1, 8, 42, 28, 1, 10, 57, 76, 1, 10, 76, 140, 25, 1, 12, 96, 254, 107, 1, 12, 120, 392, 321, 1, 14, 145, 600, 731, 70, 1, 14, 174, 840, 1462, 366, 1, 16, 204, 1170, 2610, 1308, 1, 16, 238, 1540, 4350, 3416, 196]

cp's OEIS Frontend

A231473 Number T(n,k) of equivalence classes of ways of placing k 3 X 3 tiles in an n X 5 rectangle under all symmetry operations of the rectangle; irregular triangle T(n,k), n>=3, 0<=k<=floor(n/3), read by rows.

Table of values

List of values