A238190 - cp's OEIS frontend

A238190 Number T(n,k) of equivalence classes of ways of placing k 3 X 3 tiles in an n X 4 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	1
5	1
6	1
7	1
8	2
9	1
10	2
11	2
12	1
13	3
14	4
15	1
16	3
17	8
18	1
19	4
20	12
21	3
22	1
23	4
24	18
25	8
26	1
27	5
28	24
29	22
30	1
31	5
32	32
33	40
34	6
35	1
36	6
37	40
38	73
39	22
40	1
41	6
42	50
43	112
44	66
45	1
46	7
47	60
48	172
49	146
50	10
51	1
52	7
53	72
54	240
55	292
56	48
57	1
58	8
59	84
60	335
61	516
62	174
63	1
64	8
65	98
66	440
67	860
68	448
69	20

[1, 1, 1, 1, 1, 2, 1, 2, 2, 1, 3, 4, 1, 3, 8, 1, 4, 12, 3, 1, 4, 18, 8, 1, 5, 24, 22, 1, 5, 32, 40, 6, 1, 6, 40, 73, 22, 1, 6, 50, 112, 66, 1, 7, 60, 172, 146, 10, 1, 7, 72, 240, 292, 48, 1, 8, 84, 335, 516, 174, 1, 8, 98, 440, 860, 448, 20]

cp's OEIS Frontend

A238190 Number T(n,k) of equivalence classes of ways of placing k 3 X 3 tiles in an n X 4 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

n	a(n)
3	1
4	1
5	1
6	1
7	1
8	2
9	1
10	2
11	2
12	1
13	3
14	4
15	1
16	3
17	8
18	1
19	4
20	12
21	3
22	1
23	4
24	18
25	8
26	1
27	5
28	24
29	22
30	1
31	5
32	32
33	40
34	6
35	1
36	6
37	40
38	73
39	22
40	1
41	6
42	50
43	112
44	66
45	1
46	7
47	60
48	172
49	146
50	10
51	1
52	7
53	72
54	240
55	292
56	48
57	1
58	8
59	84
60	335
61	516
62	174
63	1
64	8
65	98
66	440
67	860
68	448
69	20

n	a(n)
3	1
4	1
5	1
6	1
7	1
8	2
9	1
10	2
11	2
12	1
13	3
14	4
15	1
16	3
17	8
18	1
19	4
20	12
21	3
22	1
23	4
24	18
25	8
26	1
27	5
28	24
29	22
30	1
31	5
32	32
33	40
34	6
35	1
36	6
37	40
38	73
39	22
40	1
41	6
42	50
43	112
44	66
45	1
46	7
47	60
48	172
49	146
50	10
51	1
52	7
53	72
54	240
55	292
56	48
57	1
58	8
59	84
60	335
61	516
62	174
63	1
64	8
65	98
66	440
67	860
68	448
69	20

n	a(n)
3	1
4	1
5	1
6	1
7	1
8	2
9	1
10	2
11	2
12	1
13	3
14	4
15	1
16	3
17	8
18	1
19	4
20	12
21	3
22	1
23	4
24	18
25	8
26	1
27	5
28	24
29	22
30	1
31	5
32	32
33	40
34	6
35	1
36	6
37	40
38	73
39	22
40	1
41	6
42	50
43	112
44	66
45	1
46	7
47	60
48	172
49	146
50	10
51	1
52	7
53	72
54	240
55	292
56	48
57	1
58	8
59	84
60	335
61	516
62	174
63	1
64	8
65	98
66	440
67	860
68	448
69	20