A180760 - cp's OEIS frontend

A180760 T(n,k)=half the number of nXk binary arrays with each element equal to at least two neighbors.

n	a(n)
1	0
2	0
3	0
4	0
5	1
6	0
7	0
8	1
9	1
10	0
11	0
12	2
13	1
14	2
15	0
16	0
17	3
18	2
19	2
20	3
21	0
22	0
23	5
24	3
25	9
26	3
27	5
28	0
29	0
30	8
31	7
32	21
33	21
34	7
35	8
36	0
37	0
38	13
39	14
40	70
41	86
42	70
43	14
44	13
45	0
46	0
47	21
48	31
49	207
50	410
51	410
52	207
53	31
54	21
55	0
56	0
57	34
58	67
59	658
60	1874
61	2986
62	1874
63	658
64	67
65	34
66	0
67	0
68	55
69	148
70	2059
71	8840
72	20205
73	20205
74	8840
75	2059
76	148

[0, 0, 0, 0, 1, 0, 0, 1, 1, 0, 0, 2, 1, 2, 0, 0, 3, 2, 2, 3, 0, 0, 5, 3, 9, 3, 5, 0, 0, 8, 7, 21, 21, 7, 8, 0, 0, 13, 14, 70, 86, 70, 14, 13, 0, 0, 21, 31, 207, 410, 410, 207, 31, 21, 0, 0, 34, 67, 658, 1874, 2986, 1874, 658, 67, 34, 0, 0, 55, 148, 2059, 8840, 20205, 20205, 8840, 2059, 148]

cp's OEIS Frontend

A180760 T(n,k)=half the number of nXk binary arrays with each element equal to at least two neighbors.

Table of values

List of values