A304478 Number of nX7 0..1 arrays with every element unequal to 0, 1, 2, 4 or 6 king-move adjacent elements, with upper left element zero.

64, 432, 428, 2325, 8058, 35462, 132348, 573938, 2341508, 9662652, 39282514, 162495617, 669930287, 2768921759, 11414416244, 47122544293, 194594846556, 804284802952, 3323226448845, 13732491912928, 56753164938552

Offset

1,1

Comments

Column 7 of A304479.

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

Crossrefs

Cf. A304479.

Sequence in context: A184765 A303799 A305244 * A316303 A304847 A316544

Adjacent sequences: A304475 A304476 A304477 * A304479 A304480 A304481

Keyword

nonn

Author

R. H. Hardin, May 13 2018

Status

approved