A303015 Number of nX7 0..1 arrays with every element equal to 0, 1, 2, 4 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

64, 960, 5571, 79945, 970892, 9976891, 121524556, 1423906011, 16163776349, 190207010302, 2214124343835, 25650137255305, 299401227197388, 3483898291886107, 40523476862477296, 472073705798224700

Offset

1,1

Comments

Column 7 of A303016.

Links

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

Example

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

Crossrefs

Cf. A303016.

Sequence in context: A358861 A253133 A302321 * A302819 A303512 A000818

Adjacent sequences: A303012 A303013 A303014 * A303016 A303017 A303018

Keyword

nonn

Author

R. H. Hardin, Apr 17 2018

Status

approved