A300638 Number of nX7 0..1 arrays with every element equal to 1, 2, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

8, 223, 705, 3313, 17607, 124439, 865205, 6105466, 44264248, 319622847, 2311191759, 16797467849, 122107007666, 887949403002, 6461637480954, 47018596903063, 342127968993605, 2489544665981657, 18115122148301327

Offset

1,1

Comments

Column 7 of A300639.

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..0..1..1..1..1. .0..0..1..0..0..1..0
..0..0..0..1..0..0..1. .0..0..1..0..0..0..1. .1..0..1..0..1..0..0
..1..1..0..0..0..1..0. .0..1..0..1..1..0..1. .1..0..0..0..0..0..0
..1..0..0..1..0..1..0. .1..0..1..0..1..0..1. .0..0..0..0..1..0..0
..0..0..0..1..0..1..0. .1..0..1..0..1..0..0. .1..1..0..1..0..1..1

Crossrefs

Cf. A300639.

Sequence in context: A300349 A300434 A300768 * A301360 A267235 A230144

Adjacent sequences: A300635 A300636 A300637 * A300639 A300640 A300641

Keyword

nonn

Author

R. H. Hardin, Mar 10 2018

Status

approved