A060548 - cp's OEIS frontend

A060548 a(n) is the number of D3-symmetric patterns that may be formed with a top-down equilateral triangular arrangement of closely packed black and white cells satisfying the local matching rule of Pascal's triangle modulo 2, where n is the number of cells in each edge of the arrangement. The matching rule is such that any elementary top-down triangle of three neighboring cells in the arrangement contains either one or three white cells.

n	a(n)
1	2
2	1
3	2
4	2
5	2
6	2
7	4
8	2
9	4
10	4
11	4
12	4
13	8
14	4
15	8
16	8
17	8
18	8
19	16
20	8
21	16
22	16
23	16
24	16
25	32
26	16
27	32
28	32
29	32
30	32
31	64
32	32
33	64
34	64
35	64
36	64
37	128
38	64
39	128
40	128
41	128
42	128
43	256
44	128
45	256
46	256
47	256
48	256
49	512
50	256
51	512
52	512
53	512
54	512
55	1024
56	512
57	1024
58	1024
59	1024
60	1024
61	2048
62	1024
63	2048

[2, 1, 2, 2, 2, 2, 4, 2, 4, 4, 4, 4, 8, 4, 8, 8, 8, 8, 16, 8, 16, 16, 16, 16, 32, 16, 32, 32, 32, 32, 64, 32, 64, 64, 64, 64, 128, 64, 128, 128, 128, 128, 256, 128, 256, 256, 256, 256, 512, 256, 512, 512, 512, 512, 1024, 512, 1024, 1024, 1024, 1024, 2048, 1024, 2048]

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Table of values

List of values