A318097 Number of nX7 0..1 arrays with every element unequal to 1, 2, 3 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

8, 1634, 12774, 356786, 5965933, 114914085, 2154127036, 40412593332, 760353849044, 14283550165152, 268405179689735, 5043640701361022, 94767452445426126, 1780736873896441740, 33460072090352216055

Offset

1,1

Comments

Column 7 of A318098.

Links

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

Example

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

Crossrefs

Cf. A318098.

Sequence in context: A213961 A317822 A318429 * A230913 A163017 A221136

Adjacent sequences: A318094 A318095 A318096 * A318098 A318099 A318100

Keyword

nonn

Author

R. H. Hardin, Aug 16 2018

Status

approved