A304155 Number of nX7 0..1 arrays with every element unequal to 2, 3, 4 or 6 king-move adjacent elements, with upper left element zero.

0, 702, 1722, 60352, 839935, 12806826, 217640633, 3520683600, 56360283031, 925790421949, 14995653106319, 243449572143143, 3961555586460616, 64339957150977924, 1045521379732970185, 16993284073070123472

Offset

1,2

Comments

Column 7 of A304156.

Links

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

Example

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

Crossrefs

Cf. A304156.

Sequence in context: A252566 A269542 A237632 * A305508 A305174 A316762

Adjacent sequences: A304152 A304153 A304154 * A304156 A304157 A304158

Keyword

nonn

Author

R. H. Hardin, May 07 2018

Status

approved