A303187 Number of 7Xn 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, 2785, 6965, 20188, 148501, 1803435, 11901719, 82524101, 673749714, 5256983507, 39517545958, 303611392523, 2352342648937, 18072797704132, 138769608980368, 1068447238205615, 8223731664385640, 63249240912562142

Offset

1,1

Comments

Row 7 of A303182.

Links

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

Example

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

Crossrefs

Cf. A303182.

Sequence in context: A281475 A302628 A302420 * A302328 A303021 A302825

Adjacent sequences: A303184 A303185 A303186 * A303188 A303189 A303190

Keyword

nonn

Author

R. H. Hardin, Apr 19 2018

Status

approved