A305641 Number of nX7 0..1 arrays with every element unequal to 0, 1, 2, 4, 5 or 6 king-move adjacent elements, with upper left element zero.

64, 752, 2197, 27110, 282463, 3252937, 42274045, 591351392, 8584480725, 124078351387, 1818792685910, 27004462368229, 398796896918570, 5911358831555626, 87903132040052308, 1303849881016486552

Offset

1,1

Comments

Column 7 of A305642.

Links

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

Example

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

Crossrefs

Cf. A305642.

Sequence in context: A055867 A304346 A316217 * A317035 A305910 A317152

Adjacent sequences: A305638 A305639 A305640 * A305642 A305643 A305644

Keyword

nonn

Author

R. H. Hardin, Jun 07 2018

Status

approved