A228166 - cp's OEIS frontend

A228166 Irregular triangle read by rows: T(n,k) is the number of binary pattern classes in the (7,n)-rectangular grid with k '1's and (7n-k) '0's: two patterns are in same class if one of them can be obtained by a reflection or 180-degree rotation of the other.

n	a(n)
0	1
1	1
2	4
3	12
4	19
5	19
6	12
7	4
8	1
9	1
10	4
11	28
12	94
13	266
14	508
15	777
16	868
17	777
18	508
19	266
20	94
21	28
22	4
23	1
24	1
25	8
26	65
27	363
28	1574
29	5231
30	13826
31	29454
32	51408
33	74130
34	88900
35	88900
36	74130
37	51408
38	29454
39	13826
40	5231
41	1574
42	363
43	65
44	8
45	1
46	1
47	8
48	106
49	832
50	5199
51	24648
52	94524
53	296296
54	777997
55	1727440
56	3282774
57	5369832
58	7608483
59	9362256
60	10032648
61	9362256

[1, 1, 4, 12, 19, 19, 12, 4, 1, 1, 4, 28, 94, 266, 508, 777, 868, 777, 508, 266, 94, 28, 4, 1, 1, 8, 65, 363, 1574, 5231, 13826, 29454, 51408, 74130, 88900, 88900, 74130, 51408, 29454, 13826, 5231, 1574, 363, 65, 8, 1, 1, 8, 106, 832, 5199, 24648, 94524, 296296, 777997, 1727440, 3282774, 5369832, 7608483, 9362256, 10032648, 9362256]

cp's OEIS Frontend

A228166 Irregular triangle read by rows: T(n,k) is the number of binary pattern classes in the (7,n)-rectangular grid with k '1's and (7n-k) '0's: two patterns are in same class if one of them can be obtained by a reflection or 180-degree rotation of the other.

Table of values

List of values