A303253 Number of nX7 0..1 arrays with every element equal to 1, 2, 3, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

8, 1934, 21843, 584333, 13529019, 322544617, 7600681910, 181926316054, 4319287740641, 102749087683745, 2445959829763007, 58194271138697372, 1384700107834934771, 32952218084019479209, 784117840394793531854

Offset

1,1

Comments

Column 7 of A303254.

Links

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

Example

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

Crossrefs

Cf. A303254.

Sequence in context: A302223 A302669 A302471 * A076955 A362292 A024112

Adjacent sequences: A303250 A303251 A303252 * A303254 A303255 A303256

Keyword

nonn

Author

R. H. Hardin, Apr 20 2018

Status

approved