A183328 - cp's OEIS frontend

A183328 T(n,k)=Number of nXk binary arrays with each 1 adjacent to exactly two other 1s.

n	a(n)
1	1
2	1
3	1
4	1
5	2
6	1
7	1
8	3
9	3
10	1
11	1
12	4
13	6
14	4
15	1
16	1
17	6
18	10
19	10
20	6
21	1
22	1
23	9
24	19
25	27
26	19
27	9
28	1
29	1
30	13
31	37
32	72
33	72
34	37
35	13
36	1
37	1
38	19
39	69
40	179
41	289
42	179
43	69
44	19
45	1
46	1
47	28
48	129
49	447
50	996
51	996
52	447
53	129
54	28
55	1
56	1
57	41
58	244
59	1139
60	3325
61	4740
62	3325
63	1139
64	244
65	41
66	1
67	1
68	60
69	460
70	2912
71	11415
72	21259

[1, 1, 1, 1, 2, 1, 1, 3, 3, 1, 1, 4, 6, 4, 1, 1, 6, 10, 10, 6, 1, 1, 9, 19, 27, 19, 9, 1, 1, 13, 37, 72, 72, 37, 13, 1, 1, 19, 69, 179, 289, 179, 69, 19, 1, 1, 28, 129, 447, 996, 996, 447, 129, 28, 1, 1, 41, 244, 1139, 3325, 4740, 3325, 1139, 244, 41, 1, 1, 60, 460, 2912, 11415, 21259]

cp's OEIS Frontend

A183328 T(n,k)=Number of nXk binary arrays with each 1 adjacent to exactly two other 1s.

Table of values

List of values