A304703 Number of nX7 0..1 arrays with every element unequal to 1, 2, 4, 5 or 6 king-move adjacent elements, with upper left element zero.

8, 306, 201, 3055, 19701, 296646, 3510334, 37931518, 611105804, 7863857781, 97427633369, 1442412206399, 18997425894763, 248683605318596, 3505342390311524, 46717213252442632, 624509190471187783

Offset

1,1

Comments

Column 7 of A304704.

Links

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

Example

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

Crossrefs

Cf. A304704.

Sequence in context: A222792 A304057 A305451 * A316454 A305014 A316647

Adjacent sequences: A304700 A304701 A304702 * A304704 A304705 A304706

Keyword

nonn

Author

R. H. Hardin, May 17 2018

Status

approved