A316618 Number of nX6 0..1 arrays with every element unequal to 0, 2, 3, 5, 7 or 8 king-move adjacent elements, with upper left element zero.

1, 49, 58, 139, 468, 1916, 5428, 18126, 66146, 225773, 773853, 2706946, 9402629, 32599950, 113554758, 395078982, 1373973365, 4781242179, 16639543145, 57896830766, 201477439715, 701147733762, 2439937453112, 8490921483526

Offset

1,2

Comments

Column 6 of A316620.

Links

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

Example

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

Crossrefs

Cf. A316620.

Sequence in context: A090063 A143164 A304950 * A039472 A135145 A111327

Adjacent sequences: A316615 A316616 A316617 * A316619 A316620 A316621

Keyword

nonn

Author

R. H. Hardin, Jul 08 2018

Status

approved