A317229 Number of nX7 0..1 arrays with every element unequal to 0, 1, 2, 3, 6, 7 or 8 king-move adjacent elements, with upper left element zero.

64, 719, 4626, 29512, 575421, 7953354, 98315821, 1489532375, 21712800613, 306323777797, 4444079512911, 64413426395455, 927576853249191, 13402406215339043, 193764575657936363, 2798324709567542277

Offset

1,1

Comments

Column 7 of A317230.

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

Crossrefs

Cf. A317230.

Sequence in context: A304471 A316288 A306052 * A008513 A321830 A182673

Adjacent sequences: A317226 A317227 A317228 * A317230 A317231 A317232

Keyword

nonn

Author

R. H. Hardin, Jul 24 2018

Status

approved