A185409 - cp's OEIS frontend

A185409 T(n,k)=1/7 the number of nXk 0..6 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	13
6	1
7	7
8	150
9	150
10	7
11	13
12	1848
13	5040
14	1848
15	13
16	55
17	22656
18	279918
19	279918
20	22656
21	55
22	133
23	278832
24	12205368
25	53808534
26	12205368
27	278832
28	133
29	463
30	3430776
31	595974240
32	9560464068
33	9560464068
34	595974240
35	3430776
36	463
37	1261
38	42221928

[0, 1, 1, 1, 13, 1, 7, 150, 150, 7, 13, 1848, 5040, 1848, 13, 55, 22656, 279918, 279918, 22656, 55, 133, 278832, 12205368, 53808534, 12205368, 278832, 133, 463, 3430776, 595974240, 9560464068, 9560464068, 595974240, 3430776, 463, 1261, 42221928]

cp's OEIS Frontend

A185409 T(n,k)=1/7 the number of nXk 0..6 arrays with every element equal to exactly one or two of its horizontal and vertical neighbors.

Table of values

List of values