A317457 Number of nX7 0..1 arrays with every element unequal to 1, 2, 4, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.

8, 306, 762, 5601, 95144, 1201543, 14872138, 206130149, 3590280962, 51940140373, 776664621270, 12975679609324, 197327421376877, 3051437204855386, 49188168739227159, 762125986925678807, 11914226517686933077

Offset

1,1

Comments

Column 7 of A317458.

Links

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

Example

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

Crossrefs

Cf. A317458.

Sequence in context: A305014 A316647 A316175 * A352591 A220998 A222091

Adjacent sequences: A317454 A317455 A317456 * A317458 A317459 A317460

Keyword

nonn

Author

R. H. Hardin, Jul 28 2018

Status

approved