A185835 - cp's OEIS frontend

A185835 T(n,k)=Half the number of nXk binary arrays with every element equal to exactly one or two of its horizontal and vertical neighbors.

n	a(n)
1	0
2	1
3	1
4	1
5	3
6	1
7	2
8	10
9	10
10	2
11	3
12	23
13	30
14	23
15	3
16	5
17	61
18	118
19	118
20	61
21	5
22	8
23	162
24	393
25	514
26	393
27	162
28	8
29	13
30	421
31	1430
32	2398
33	2398
34	1430
35	421
36	13
37	21
38	1103
39	5004
40	11789
41	15782
42	11789
43	5004
44	1103
45	21
46	34
47	2890
48	17877
49	54223
50	98975
51	98975
52	54223
53	17877
54	2890
55	34
56	55

[0, 1, 1, 1, 3, 1, 2, 10, 10, 2, 3, 23, 30, 23, 3, 5, 61, 118, 118, 61, 5, 8, 162, 393, 514, 393, 162, 8, 13, 421, 1430, 2398, 2398, 1430, 421, 13, 21, 1103, 5004, 11789, 15782, 11789, 5004, 1103, 21, 34, 2890, 17877, 54223, 98975, 98975, 54223, 17877, 2890, 34, 55]

cp's OEIS Frontend

A185835 T(n,k)=Half the number of nXk binary arrays with every element equal to exactly one or two of its horizontal and vertical neighbors.

Table of values

List of values