A231257 - cp's OEIS frontend

A231257 Number of (n+1) X (2+1) 0..2 arrays with no element unequal to a strict majority of its horizontal and antidiagonal neighbors, with values 0..2 introduced in row major order.

n	a(n)
1	3
2	15
3	89
4	547
5	3381
6	20911
7	129329
8	799835
9	4946509
10	30591143
11	189187465
12	1170008467
13	7235785189
14	44748896799
15	276744502881
16	1711495152971
17	10584548667901
18	65458946997783
19	404823472069561
20	2503585087356803

[3, 15, 89, 547, 3381, 20911, 129329, 799835, 4946509, 30591143, 189187465, 1170008467, 7235785189, 44748896799, 276744502881, 1711495152971, 10584548667901, 65458946997783, 404823472069561, 2503585087356803]

cp's OEIS Frontend

A231257 Number of (n+1) X (2+1) 0..2 arrays with no element unequal to a strict majority of its horizontal and antidiagonal neighbors, with values 0..2 introduced in row major order.

Table of values

List of values