A303895 Number of nX7 0..1 arrays with every element unequal to 1, 2, 3 or 4 king-move adjacent elements, with upper left element zero.

8, 4184, 11916, 195279, 992789, 9758243, 71307109, 596704142, 4824517709, 38791293621, 322218371259, 2587399475622, 21498304831181, 174578118724592, 1440073455933753, 11819772450712206, 97045220051756051, 800488399136803935

Offset

1,1

Comments

Column 7 of A303896.

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

Crossrefs

Cf. A303896.

Sequence in context: A203436 A159368 A167065 * A305287 A304900 A316582

Adjacent sequences: A303892 A303893 A303894 * A303896 A303897 A303898

Keyword

nonn

Author

R. H. Hardin, May 02 2018

Status

approved