A303324 Number of nX7 0..1 arrays with every element equal to 0, 2, 4, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

1, 128, 4, 46, 368, 758, 2956, 15494, 44101, 190416, 843033, 3033091, 12413910, 51530654, 201376755, 814350745, 3304173349, 13195116320, 53237817569, 214790465512, 862745046281, 3476740567795, 14008372152609, 56369700131001

Offset

1,2

Comments

Column 7 of A303325.

Links

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

Example

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

Crossrefs

Cf. A303325.

Sequence in context: A035880 A010369 A351247 * A121374 A336774 A252487

Adjacent sequences: A303321 A303322 A303323 * A303325 A303326 A303327

Keyword

nonn

Author

R. H. Hardin, Apr 21 2018

Status

approved