A317564 Number of nX7 0..1 arrays with every element unequal to 0, 1, 2, 3, 4, 5, 7 or 8 king-move adjacent elements, with upper left element zero.

64, 8192, 581541, 40491721, 2853437287, 200422637482, 14085130453968, 989910863217269, 69566536617221409, 4888995296246370182, 343585229724494063841, 24146288349020453821543, 1696939049515195754479868

Offset

1,1

Comments

Column 7 of A317565.

Links

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

Example

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

Crossrefs

Cf. A317565.

Sequence in context: A316814 A320370 A298969 * A299739 A302740 A299660

Adjacent sequences: A317561 A317562 A317563 * A317565 A317566 A317567

Keyword

nonn

Author

R. H. Hardin, Jul 31 2018

Status

approved