A228167 - cp's OEIS frontend

A228167 Irregular triangle read by rows: T(n,k) is the number of binary pattern classes in the (8,n)-rectangular grid with k '1's and (8n-k) '0's: two patterns are in the 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	16
4	28
5	38
6	28
7	16
8	4
9	1
10	1
11	4
12	36
13	140
14	476
15	1092
16	2044
17	2860
18	3270
19	2860
20	2044
21	1092
22	476
23	140
24	36
25	4
26	1
27	1
28	8
29	84
30	536
31	2770
32	10808
33	34116
34	87144
35	185071
36	328208
37	492392
38	625968
39	678524
40	625968
41	492392
42	328208
43	185071
44	87144
45	34116
46	10808
47	2770
48	536
49	84
50	8
51	1

[1, 1, 4, 16, 28, 38, 28, 16, 4, 1, 1, 4, 36, 140, 476, 1092, 2044, 2860, 3270, 2860, 2044, 1092, 476, 140, 36, 4, 1, 1, 8, 84, 536, 2770, 10808, 34116, 87144, 185071, 328208, 492392, 625968, 678524, 625968, 492392, 328208, 185071, 87144, 34116, 10808, 2770, 536, 84, 8, 1]

cp's OEIS Frontend

A228167 Irregular triangle read by rows: T(n,k) is the number of binary pattern classes in the (8,n)-rectangular grid with k '1's and (8n-k) '0's: two patterns are in the 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