A283571 Number of nX7 0..1 arrays with no 1 equal to more than one of its horizontal, diagonal and antidiagonal neighbors, with the exception of exactly one element.

26, 2832, 104464, 3890056, 129527524, 4173039716, 129997769458, 3965206666608, 118919078661476, 3520469545329364, 103128721861954074, 2995091644500263428, 86357662212925835570, 2474720063522591410712, 70543862532039328231208

Offset

1,1

Comments

Column 7 of A283572.

Links

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

Example

Some solutions for n=3
..0..0..1..0..1..1..1. .0..1..0..0..0..0..1. .0..0..0..0..0..0..0
..0..0..0..0..0..0..0. .0..0..0..1..1..0..1. .1..0..0..0..0..1..0
..1..1..0..1..1..0..0. .1..0..1..0..1..0..0. .0..1..1..0..0..0..0

Crossrefs

Cf. A283572.

Sequence in context: A263946 A358164 A172010 * A283041 A183068 A173130

Adjacent sequences: A283568 A283569 A283570 * A283572 A283573 A283574

Keyword

nonn

Author

R. H. Hardin, Mar 11 2017

Status

approved