A317117 Number of nX7 0..1 arrays with every element unequal to 0, 1, 2, 3, 4, 7 or 8 king-move adjacent elements, with upper left element zero.

64, 5912, 81809, 2000595, 45938893, 1080066752, 25956605294, 620005212254, 14887658798448, 357027011583501, 8567248019037287, 205567120831340263, 4932555193477059178, 118358510326695768714, 2840031414224031094307

Offset

1,1

Comments

Column 7 of A317118.

Links

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

Example

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

Crossrefs

Cf. A317118.

Sequence in context: A281954 A316182 A305768 * A305529 A317003 A316821

Adjacent sequences: A317114 A317115 A317116 * A317118 A317119 A317120

Keyword

nonn

Author

R. H. Hardin, Jul 21 2018

Status

approved