A230675 - cp's OEIS frontend

A230675 T(n,k)=Number of nXk 0..2 arrays x(i,j) with each element horizontally, diagonally or antidiagonally next to at least one element with value 2-x(i,j).

n	a(n)
1	0
2	3
3	0
4	3
5	15
6	0
7	9
8	87
9	81
10	0
11	15
12	513
13	1173
14	423
15	0
16	33
17	3387
18	18915
19	17271
20	2247
21	0
22	63
23	21933
24	340563
25	730503
26	251595
27	11925
28	0
29	129
30	141411
31	6081561
32	37034355
33	28368687
34	3669765
35	63291
36	0
37	255
38	913245
39	108108231
40	1844154933
41	4022141121
42	1100265795

[0, 3, 0, 3, 15, 0, 9, 87, 81, 0, 15, 513, 1173, 423, 0, 33, 3387, 18915, 17271, 2247, 0, 63, 21933, 340563, 730503, 251595, 11925, 0, 129, 141411, 6081561, 37034355, 28368687, 3669765, 63291, 0, 255, 913245, 108108231, 1844154933, 4022141121, 1100265795]

cp's OEIS Frontend

A230675 T(n,k)=Number of nXk 0..2 arrays x(i,j) with each element horizontally, diagonally or antidiagonally next to at least one element with value 2-x(i,j).

Table of values

List of values