A238582 - cp's OEIS frontend

A238582 Number T(n,k) of equivalence classes of ways of placing k 3 X 3 tiles in an n X 9 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	4
5	6
6	1
7	1
8	4
9	12
10	3
11	1
12	8
13	28
14	10
15	1
16	8
17	54
18	82
19	49
20	8
21	1
22	1
23	12
24	95
25	283
26	311
27	91
28	10
29	1
30	12
31	146
32	647
33	1118
34	451
35	68
36	1
37	16
38	212
39	1300
40	3380
41	3076
42	1200
43	209
44	20
45	1
46	1
47	16
48	288
49	2260
50	8443
51	13336
52	9364
53	2819
54	387
55	20

[1, 4, 6, 1, 1, 4, 12, 3, 1, 8, 28, 10, 1, 8, 54, 82, 49, 8, 1, 1, 12, 95, 283, 311, 91, 10, 1, 12, 146, 647, 1118, 451, 68, 1, 16, 212, 1300, 3380, 3076, 1200, 209, 20, 1, 1, 16, 288, 2260, 8443, 13336, 9364, 2819, 387, 20]

cp's OEIS Frontend

A238582 Number T(n,k) of equivalence classes of ways of placing k 3 X 3 tiles in an n X 9 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