A279133 Number of nX7 0..1 arrays with no element equal to a strict majority of its horizontal and vertical neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.

15, 400, 7491, 129264, 2017028, 29410145, 409061044, 5488392521, 71618045798, 913912909445, 11451034651712, 141307143171540, 1721381619036321, 20738815798941668, 247471563012643095, 2928344313826748362

Offset: 1

Author

R. H. Hardin, Dec 06 2016

Keywords

• nonn

Comments

Column 7 of A279134.

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..83

Crossrefs

Cf. A279134.