A279971 - cp's OEIS frontend

A279971 Number of n X 2 0..1 arrays with no element equal to a strict majority of its horizontal 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	3
3	9
4	31
5	108
6	366
7	1205
8	3873
9	12207
10	37859
11	115842
12	350412
13	1049545
14	3116655
15	9185349
16	26890375
17	78253896
18	226510362
19	652483133
20	1871302893
21	5345409483
22	15213423371
23	43153001406
24	122024489304
25	344061371665
26	967537410459

[1, 3, 9, 31, 108, 366, 1205, 3873, 12207, 37859, 115842, 350412, 1049545, 3116655, 9185349, 26890375, 78253896, 226510362, 652483133, 1871302893, 5345409483, 15213423371, 43153001406, 122024489304, 344061371665, 967537410459]

cp's OEIS Frontend

A279971 Number of n X 2 0..1 arrays with no element equal to a strict majority of its horizontal 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