A280174 - cp's OEIS frontend

A280174 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 two elements, and with new values introduced in order 0 sequentially upwards.

n	a(n)
1	1
2	2
3	12
4	41
5	103
6	263
7	656
8	1618
9	3931
10	9459
11	22557
12	53395
13	125594
14	293796
15	683972
16	1585588
17	3661900
18	8428646
19	19341455
20	44261305
21	101034472
22	230100558
23	522936849
24	1186138105
25	2685582035
26	6070360107
27	13699764020
28	30873005212
29	69478759648

[1, 2, 12, 41, 103, 263, 656, 1618, 3931, 9459, 22557, 53395, 125594, 293796, 683972, 1585588, 3661900, 8428646, 19341455, 44261305, 101034472, 230100558, 522936849, 1186138105, 2685582035, 6070360107, 13699764020, 30873005212, 69478759648]

cp's OEIS Frontend

A280174 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 two elements, and with new values introduced in order 0 sequentially upwards.

Table of values

List of values