A231213 - cp's OEIS frontend

A231213 Number of (n+1) X (2+1) 0..2 arrays with no element unequal to a strict majority of its horizontal and vertical neighbors, with values 0..2 introduced in row major order.

n	a(n)
1	4
2	9
3	22
4	59
5	156
6	413
7	1098
8	2919
9	7760
10	20633
11	54862
12	145875
13	387876
14	1031349
15	2742322
16	7291743
17	19388504
18	51553393
19	137078774
20	364487947
21	969161452
22	2576968397
23	6852074138
24	18219439575
25	48444890080
26	128813368009
27	342510505246

[4, 9, 22, 59, 156, 413, 1098, 2919, 7760, 20633, 54862, 145875, 387876, 1031349, 2742322, 7291743, 19388504, 51553393, 137078774, 364487947, 969161452, 2576968397, 6852074138, 18219439575, 48444890080, 128813368009, 342510505246]

cp's OEIS Frontend

A231213 Number of (n+1) X (2+1) 0..2 arrays with no element unequal to a strict majority of its horizontal and vertical neighbors, with values 0..2 introduced in row major order.

Table of values

List of values