A316575 Number of nX7 0..1 arrays with every element unequal to 0, 2, 3, 4, 7 or 8 king-move adjacent elements, with upper left element zero.

1, 908, 776, 18773, 88597, 873130, 8469438, 69549901, 725190299, 6315097544, 61773292677, 570830696609, 5379371267342, 50703338882337, 474680398020205, 4476541749351246, 41994472656236049, 395161589819910596

Offset

1,2

Comments

Column 7 of A316576.

Links

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

Example

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

Crossrefs

Cf. A316576.

Sequence in context: A303887 A305280 A304893 * A304550 A316375 A306135

Adjacent sequences: A316572 A316573 A316574 * A316576 A316577 A316578

Keyword

nonn

Author

R. H. Hardin, Jul 07 2018

Status

approved