A298166 Number of nX7 0..1 arrays with every element equal to 3, 4, 5 or 8 king-move adjacent elements, with upper left element zero.

0, 8, 8, 18, 32, 133, 624, 4525, 22143, 189512, 1055639, 8706804, 56180515, 430152862, 2980641029, 22009904805, 156293859632, 1140069517515, 8166045697940, 59256213868695, 426194534840118, 3084307811815052

Offset

1,2

Comments

Column 7 of A298167.

Links

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

Example

Some solutions for n=8
..0..0..0..0..0..1..1. .0..0..0..0..0..0..0. .0..0..0..0..0..0..0
..0..0..1..0..0..1..1. .0..0..0..1..1..0..0. .0..0..1..1..0..0..0
..0..1..1..1..0..0..1. .1..1..1..0..1..1..1. .1..1..1..0..1..1..1
..1..0..0..1..0..1..1. .1..1..1..0..0..1..1. .1..1..0..0..0..1..1
..1..1..0..0..1..0..1. .1..1..1..0..1..0..0. .0..0..1..1..1..0..0
..1..1..1..1..0..1..0. .0..0..0..1..1..0..0. .0..0..0..1..0..0..0
..0..0..0..1..1..0..0. .0..0..0..1..1..0..0. .1..1..0..0..1..1..1
..0..0..0..1..1..0..0. .0..0..0..1..1..0..0. .1..1..1..1..1..1..1

Crossrefs

Cf. A298167.

Sequence in context: A214830 A168456 A346532 * A298956 A232652 A299592

Adjacent sequences: A298163 A298164 A298165 * A298167 A298168 A298169

Keyword

nonn

Author

R. H. Hardin, Jan 14 2018

Status

approved