A305044 Number of nX5 0..1 arrays with every element unequal to 0, 2, 3, 6 or 7 king-move adjacent elements, with upper left element zero.

1, 26, 15, 20, 55, 201, 337, 1359, 5918, 13840, 50917, 214418, 640869, 2276124, 8928543, 29953696, 106456744, 399005390, 1401253518, 5009804395, 18368049681, 65601194194, 235509869390, 855175501812, 3072957989537, 11056497704449

Offset

1,2

Comments

Column 5 of A305047.

Links

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

Example

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

Crossrefs

Cf. A305047.

Sequence in context: A036168 A005606 A304138 * A064267 A131083 A203597

Adjacent sequences: A305041 A305042 A305043 * A305045 A305046 A305047

Keyword

nonn

Author

R. H. Hardin, May 24 2018

Status

approved