A280155 - cp's OEIS frontend

A280155 Number of n X 2 0..1 arrays with no element unequal to a strict majority of its horizontal, vertical and antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.

n	a(n)
1	0
2	4
3	8
4	18
5	40
6	92
7	208
8	470
9	1060
10	2384
11	5352
12	11992
13	26824
14	59906
15	133592
16	297510
17	661720
18	1470062
19	3262264
20	7231940
21	16016596
22	35439722
23	78349800
24	173074816
25	382029988
26	842648168
27	1857362384
28	4091321478
29	9006604780
30	19815365450

[0, 4, 8, 18, 40, 92, 208, 470, 1060, 2384, 5352, 11992, 26824, 59906, 133592, 297510, 661720, 1470062, 3262264, 7231940, 16016596, 35439722, 78349800, 173074816, 382029988, 842648168, 1857362384, 4091321478, 9006604780, 19815365450]

cp's OEIS Frontend

A280155 Number of n X 2 0..1 arrays with no element unequal to a strict majority of its horizontal, vertical and antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.

Table of values

List of values