A304009 Number of nX7 0..1 arrays with every element unequal to 0, 2, 3 or 5 king-move adjacent elements, with upper left element zero.

1, 99, 99, 211, 655, 1458, 4224, 10633, 28365, 75175, 201031, 544217, 1452266, 3908208, 10505646, 28266755, 76097248, 204983456, 552420015, 1488384837, 4011805443, 10816167549, 29162780211, 78639733211, 212076547630

Offset

1,2

Comments

Column 7 of A304010.

Links

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

Example

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

Crossrefs

Cf. A304010.

Sequence in context: A110397 A298509 A185504 * A305359 A213157 A317592

Adjacent sequences: A304006 A304007 A304008 * A304010 A304011 A304012

Keyword

nonn

Author

R. H. Hardin, May 04 2018

Status

approved