A317269 Number of nX6 0..1 arrays with every element unequal to 0, 2, 3, 4, 6, 7 or 8 king-move adjacent elements, with upper left element zero.

1, 272, 842, 16877, 269286, 3234635, 52389467, 773668467, 11290705493, 170621554982, 2539927769977, 37874050523071, 566519072518773, 8458775423505580, 126360722809445467, 1887999263939269044

Offset

1,2

Comments

Column 6 of A317271.

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. .0..1..0..0..0..1. .0..1..0..0..0..1. .0..1..0..1..0..0
..1..1..1..0..1..0. .0..1..1..0..1..0. .0..1..0..0..0..1. .0..1..1..0..1..1
..1..1..0..0..1..0. .1..1..1..1..0..0. .0..0..0..0..0..0. .1..1..1..1..1..0
..1..1..0..0..0..1. .1..0..1..0..0..1. .1..1..0..1..1..0. .1..0..1..1..0..1
..0..0..1..1..0..1. .1..0..1..1..1..0. .0..1..0..0..0..1. .1..0..0..1..0..1

Crossrefs

Cf. A317271.

Sequence in context: A304549 A316374 A306134 * A253113 A234884 A158587

Adjacent sequences: A317266 A317267 A317268 * A317270 A317271 A317272

Keyword

nonn

Author

R. H. Hardin, Jul 25 2018

Status

approved