A300505 Number of nX7 0..1 arrays with every element equal to 0, 1, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

21, 11, 34, 191, 546, 4067, 17412, 112660, 634311, 3789374, 21768434, 127922510, 740390307, 4332789535, 25223205362, 147301185909, 859118123084, 5015850403762, 29268855094463, 170854627899949, 997148101828012

Offset

1,1

Comments

Column 7 of A300506.

Links

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

Example

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

Crossrefs

Cf. A300506.

Sequence in context: A033341 A252629 A213217 * A086981 A114011 A300943

Adjacent sequences: A300502 A300503 A300504 * A300506 A300507 A300508

Keyword

nonn

Author

R. H. Hardin, Mar 07 2018

Status

approved