A305339 Number of nX7 0..1 arrays with every element unequal to 0, 1, 2, 5 or 8 king-move adjacent elements, with upper left element zero.

64, 101, 431, 3186, 23348, 176673, 1321695, 9959836, 75112075, 566241938, 4269343299, 32193597374, 242759393636, 1830541536206, 13803437729415, 104086731979129, 784879875501723, 5918493129030554, 44629209229558533

Offset

1,1

Comments

Column 7 of A305340.

Links

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

Example

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

Crossrefs

Cf. A305340.

Sequence in context: A088033 A303960 A304603 * A304925 A316419 A306165

Adjacent sequences: A305336 A305337 A305338 * A305340 A305341 A305342

Keyword

nonn

Author

R. H. Hardin, May 30 2018

Status

approved