A304766 Number of nX7 0..1 arrays with every element unequal to 2, 3, 4, 5 or 6 king-move adjacent elements, with upper left element zero.

0, 702, 22187, 1999511, 153265405, 12219307955, 969267512820, 77018325396680, 6119460744287122, 486255500462536848, 38638506180388225818, 3070282856537314013825, 243970256623096658549212

Offset

1,2

Comments

Column 7 of A304767.

Links

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

Example

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

Crossrefs

Cf. A304767.

Sequence in context: A305456 A305021 A316685 * A316510 A317464 A035852

Adjacent sequences: A304763 A304764 A304765 * A304767 A304768 A304769

Keyword

nonn

Author

R. H. Hardin, May 18 2018

Status

approved