A279490 Number of nX4 0..1 arrays with no element equal 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.

3, 18, 254, 2684, 26157, 246237, 2241332, 19885341, 172968364, 1481176019, 12518566165, 104634697841, 866300549164, 7113499311107, 57991161908834, 469750378139503, 3783568376847729, 30319325084628268, 241845032680119474

Offset: 1

Author

R. H. Hardin, Dec 13 2016

Keywords

• nonn

Comments

Column 4 of A279494.

Examples

			Some solutions for n=4
..0..1..1..1. .0..0..0..0. .0..1..0..0. .0..1..0..1. .0..1..1..0
..0..1..0..1. .1..0..1..1. .0..1..0..0. .0..1..0..0. .1..1..0..1
..0..1..0..0. .1..1..0..1. .0..0..1..1. .1..1..0..1. .0..0..1..1
..0..1..0..1. .0..0..1..0. .1..1..0..1. .1..0..1..0. .0..1..0..0
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210

Crossrefs

Cf. A279494.