A283863 Number of 7Xn 0..1 arrays with no 1 equal to more than three of its horizontal, diagonal and antidiagonal neighbors.

128, 16384, 955680, 71903903, 5921518755, 457711375590, 35481195059121, 2782923466639665, 217518560684113038, 16981222926091090679, 1326999476774635673172, 103695192517969043697972

Offset

1,1

Comments

Row 7 of A283857.

Links

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

Example

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

Crossrefs

Cf. A283857.

Sequence in context: A188908 A189109 A297380 * A223568 A144321 A051251

Adjacent sequences: A283860 A283861 A283862 * A283864 A283865 A283866

Keyword

nonn

Author

R. H. Hardin, Mar 17 2017

Status

approved