A303689 Number of nX7 0..1 arrays with every element unequal to 2, 3 or 4 king-move adjacent elements, with upper left element zero.

0, 702, 191, 5563, 4619, 55382, 99205, 713542, 1964803, 10454428, 36456925, 170495722, 667372121, 2966797695, 12357633485, 53847703784, 232236213151, 1006212092360, 4425027446469, 19184005184192, 85271913119853

Offset

1,2

Comments

Column 7 of A303690.

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..0. .0..1..1..0..0..1..0. .0..1..1..0..1..1..0
..1..0..0..0..1..1..1. .1..0..0..0..1..1..0. .0..1..1..0..0..0..1
..0..1..0..0..1..1..0. .1..0..0..1..1..1..0. .1..1..1..0..0..1..0
..1..1..1..0..1..1..0. .0..0..0..1..1..0..0. .0..1..0..0..1..1..1
..0..1..0..1..0..0..1. .1..1..1..0..0..0..1. .1..0..0..1..0..1..0

Crossrefs

Cf. A303690.

Sequence in context: A031423 A140433 A316969 * A252567 A252574 A252575

Adjacent sequences: A303686 A303687 A303688 * A303690 A303691 A303692

Keyword

nonn

Author

R. H. Hardin, Apr 28 2018

Status

approved