A320363 Number of nX7 0..1 arrays with every element unequal to 2, 3, 4 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

0, 45, 1111, 32371, 1076811, 33825987, 1076542482, 34268936133, 1089237599640, 34629240586282, 1101078486409810, 35008543878056364, 1113085385544576174, 35390280162099120910, 1125225503711958393640, 35776275240752167917918

Offset

1,2

Comments

Column 7 of A320364.

Links

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

Example

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

Crossrefs

Cf. A320364.

Sequence in context: A282929 A177728 A265615 * A140346 A268870 A049447

Adjacent sequences: A320360 A320361 A320362 * A320364 A320365 A320366

Keyword

nonn

Author

R. H. Hardin, Oct 11 2018

Status

approved