A231221 - cp's OEIS frontend

A231221 Number of (n+2) X (2+2) 0..2 arrays with no element unequal to a strict majority of its horizontal, vertical, diagonal and antidiagonal neighbors, with values 0..2 introduced in row major order.

n	a(n)
1	2
2	4
3	8
4	17
5	45
6	103
7	264
8	676
9	1724
10	4501
11	11679
12	30579
13	80180
14	210494
15	553858
16	1457853
17	3840945
18	10124071
19	26693522
20	70402100
21	185706800
22	489925347
23	1292616577
24	3410640207
25	8999588762
26	23747752874
27	62666069376
28	165367179091

[2, 4, 8, 17, 45, 103, 264, 676, 1724, 4501, 11679, 30579, 80180, 210494, 553858, 1457853, 3840945, 10124071, 26693522, 70402100, 185706800, 489925347, 1292616577, 3410640207, 8999588762, 23747752874, 62666069376, 165367179091]

cp's OEIS Frontend

A231221 Number of (n+2) X (2+2) 0..2 arrays with no element unequal to a strict majority of its horizontal, vertical, diagonal and antidiagonal neighbors, with values 0..2 introduced in row major order.

Table of values

List of values