A317159 Number of nX7 0..1 arrays with every element unequal to 0, 1, 3, 4, 5, 7 or 8 king-move adjacent elements, with upper left element zero.

21, 289, 394, 5458, 65283, 887617, 20168266, 403588059, 7455221517, 157652314841, 3278034102350, 65599384303310, 1352543915841254, 27963512709938535, 571322773525176426, 11733856161593435547, 241590042914729211337

Offset

1,1

Comments

Column 7 of A317160.

Links

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

Example

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

Crossrefs

Cf. A317160.

Sequence in context: A304354 A305917 A316238 * A305648 A316924 A317042

Adjacent sequences: A317156 A317157 A317158 * A317160 A317161 A317162

Keyword

nonn

Author

R. H. Hardin, Jul 22 2018

Status

approved