A231390 - cp's OEIS frontend

A231390 Number of (n+1) X (2+1) 0..2 arrays with no element unequal to a strict majority of its horizontal, diagonal and antidiagonal neighbors, with values 0..2 introduced in row major order.

n	a(n)
1	7
2	8
3	15
4	20
5	31
6	52
7	95
8	180
9	351
10	692
11	1375
12	2740
13	5471
14	10932
15	21855
16	43700
17	87391
18	174772
19	349535
20	699060
21	1398111
22	2796212
23	5592415
24	11184820
25	22369631
26	44739252
27	89478495
28	178956980
29	357913951
30	715827892
31	1431655775
32	2863311540
33	5726623071

[7, 8, 15, 20, 31, 52, 95, 180, 351, 692, 1375, 2740, 5471, 10932, 21855, 43700, 87391, 174772, 349535, 699060, 1398111, 2796212, 5592415, 11184820, 22369631, 44739252, 89478495, 178956980, 357913951, 715827892, 1431655775, 2863311540, 5726623071]

cp's OEIS Frontend

A231390 Number of (n+1) X (2+1) 0..2 arrays with no element unequal to a strict majority of its horizontal, diagonal and antidiagonal neighbors, with values 0..2 introduced in row major order.

Table of values

List of values