A305775 Number of nX7 0..1 arrays with every element unequal to 0, 1, 2, 3, 5 or 7 king-move adjacent elements, with upper left element zero.

64, 1709, 15953, 199257, 2553685, 33891076, 453853629, 6095547869, 81987206051, 1103823817459, 14865759771623, 200213645647179, 2696683554462562, 36322886951923401, 489251552122709363, 6590002565528940149

Offset

1,1

Comments

Column 7 of A305776.

Links

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

Example

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

Crossrefs

Cf. A305776.

Sequence in context: A195807 A304309 A316208 * A317124 A305592 A317010

Adjacent sequences: A305772 A305773 A305774 * A305776 A305777 A305778

Keyword

nonn

Author

R. H. Hardin, Jun 10 2018

Status

approved