A185540 - cp's OEIS frontend

A185540 T(n,k)=1/6 the number of nXk 0..5 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	11
6	1
7	6
8	110
9	110
10	6
11	11
12	1155
13	2990
14	1155
15	11
16	41
17	12105
18	127570
19	127570
20	12105
21	41
22	96
23	127190
24	4403225
25	17526450
26	4403225
27	127190
28	96
29	301
30	1336205
31	167398110
32	2241330570
33	2241330570
34	167398110
35	1336205
36	301
37	781
38	14039455

[0, 1, 1, 1, 11, 1, 6, 110, 110, 6, 11, 1155, 2990, 1155, 11, 41, 12105, 127570, 127570, 12105, 41, 96, 127190, 4403225, 17526450, 4403225, 127190, 96, 301, 1336205, 167398110, 2241330570, 2241330570, 167398110, 1336205, 301, 781, 14039455]

cp's OEIS Frontend

A185540 T(n,k)=1/6 the number of nXk 0..5 arrays with every element equal to exactly one or two of its horizontal and vertical neighbors.

Table of values

List of values