A303181 Number of nX7 0..1 arrays with every element equal to 0, 1, 2, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

64, 361, 873, 6668, 88153, 1064399, 11901719, 141429948, 1665576584, 19531596851, 229828243748, 2702369176839, 31772132296596, 373609367008990, 4392997891254184, 51654822706157964, 607381965429018032

Offset

1,1

Comments

Column 7 of A303182.

Links

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

Example

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

Crossrefs

Cf. A303182.

Sequence in context: A281468 A302622 A302414 * A017486 A344302 A105918

Adjacent sequences: A303178 A303179 A303180 * A303182 A303183 A303184

Keyword

nonn

Author

R. H. Hardin, Apr 19 2018

Status

approved