A304309 Number of nX7 0..1 arrays with every element unequal to 0, 1, 2, 3 or 5 king-move adjacent elements, with upper left element zero.

64, 1709, 11739, 98560, 795436, 6692008, 55773947, 469033247, 3946132559, 33242556463, 280161568151, 2362143678441, 19918532113668, 167984507121399, 1416792646490945, 11949807858550668, 100791830174081780

Offset

1,1

Comments

Column 7 of A304310.

Links

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

Example

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

Crossrefs

Cf. A304310.

Sequence in context: A297092 A284340 A195807 * A316208 A305775 A317124

Adjacent sequences: A304306 A304307 A304308 * A304310 A304311 A304312

Keyword

nonn

Author

R. H. Hardin, May 10 2018

Status

approved