A305646 Number of nX5 0..1 arrays with every element unequal to 0, 1, 3, 4, 5 or 6 king-move adjacent elements, with upper left element zero.

8, 57, 79, 574, 5547, 31079, 304707, 3821570, 37230262, 388189669, 4449595170, 48262760771, 521200625130, 5779813369002, 63596590407636, 696061137670578, 7663456805291520, 84355346903004403, 926775618019247726

Offset

1,1

Comments

Column 5 of A305649.

Links

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

Example

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

Crossrefs

Cf. A305649.

Sequence in context: A305915 A316236 A317157 * A316922 A317040 A317694

Adjacent sequences: A305643 A305644 A305645 * A305647 A305648 A305649

Keyword

nonn

Author

R. H. Hardin, Jun 07 2018

Status

approved