A283231 Number of nX7 0..1 arrays with no 1 equal to more than two of its horizontal and vertical neighbors, with the exception of exactly two elements.

0, 1376, 338397, 47531178, 5735340380, 628267302565, 64590243667344, 6347644826932771, 603124906010664854, 55820729585827738580, 5058732535887213720189, 450601583645724092513122

Offset

1,2

Comments

Column 7 of A283232.

Links

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

Example

Some solutions for n=2
..1..1..1..1..1..1..1. .1..1..1..1..1..0..1. .1..1..0..1..0..0..0
..0..0..0..1..0..1..0. .0..1..1..0..0..1..0. .1..1..1..1..1..1..1

Crossrefs

Cf. A283232.

Sequence in context: A056087 A122692 A076760 * A283790 A345515 A345768

Adjacent sequences: A283228 A283229 A283230 * A283232 A283233 A283234

Keyword

nonn

Author

R. H. Hardin, Mar 03 2017

Status

approved