A238009 - cp's OEIS frontend

A238009 Number T(n,k) of equivalence classes of ways of placing k 2 X 2 tiles in an n X 3 rectangle under all symmetry operations of the rectangle; irregular triangle T(n,k), n>=2, 0<=k<=floor(n/2), read by rows.

n	a(n)
2	1
3	1
4	1
5	1
6	1
7	2
8	2
9	1
10	2
11	4
12	1
13	3
14	8
15	3
16	1
17	3
18	12
19	8
20	1
21	4
22	18
23	22
24	6
25	1
26	4
27	24
28	40
29	22
30	1
31	5
32	32
33	73
34	66
35	10
36	1
37	5
38	40
39	112
40	146
41	48
42	1
43	6
44	50
45	172
46	292
47	174
48	20
49	1
50	6
51	60
52	240
53	516
54	448
55	116
56	1
57	7
58	72
59	335
60	860
61	1020
62	464
63	36
64	1
65	7
66	84
67	440
68	1340
69	2016
70	1360
71	256

[1, 1, 1, 1, 1, 2, 2, 1, 2, 4, 1, 3, 8, 3, 1, 3, 12, 8, 1, 4, 18, 22, 6, 1, 4, 24, 40, 22, 1, 5, 32, 73, 66, 10, 1, 5, 40, 112, 146, 48, 1, 6, 50, 172, 292, 174, 20, 1, 6, 60, 240, 516, 448, 116, 1, 7, 72, 335, 860, 1020, 464, 36, 1, 7, 84, 440, 1340, 2016, 1360, 256]

cp's OEIS Frontend

A238009 Number T(n,k) of equivalence classes of ways of placing k 2 X 2 tiles in an n X 3 rectangle under all symmetry operations of the rectangle; irregular triangle T(n,k), n>=2, 0<=k<=floor(n/2), read by rows.

Table of values

List of values