A302894 Number of 7Xn 0..1 arrays with every element equal to 0, 2, 3, 4 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

64, 21, 8968, 28594, 2059835, 60501563, 2899297652, 133518102376, 6327934680000, 307776560940205, 14923956123066383, 730433298641263668, 35734411310196784099, 1751985608336100700720, 85921025124831969145232

Offset

1,1

Comments

Row 7 of A302889.

Links

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

Example

Some solutions for n=5
..0..0..0..0..0. .0..0..0..1..0. .0..0..0..0..0. .0..0..0..0..0
..0..0..0..0..1. .0..0..0..1..0. .0..0..0..0..0. .0..0..0..0..0
..0..1..1..0..0. .1..0..1..1..1. .0..1..1..1..1. .1..1..1..0..0
..1..0..1..1..1. .0..0..0..0..1. .0..0..1..1..1. .0..1..1..0..0
..0..1..1..1..1. .1..0..0..1..1. .1..0..1..1..0. .1..1..0..1..1
..0..0..0..0..0. .1..0..0..1..1. .1..0..0..1..1. .0..0..0..1..0
..1..0..0..0..0. .0..0..0..1..1. .1..0..0..1..1. .0..0..1..1..1

Crossrefs

Cf. A302889.

Sequence in context: A303247 A302373 A303089 * A303629 A302520 A302685

Adjacent sequences: A302891 A302892 A302893 * A302895 A302896 A302897

Keyword

nonn

Author

R. H. Hardin, Apr 15 2018

Status

approved