A317124 Number of nX7 0..1 arrays with every element unequal to 0, 1, 2, 3, 5, 7 or 8 king-move adjacent elements, with upper left element zero.

64, 1709, 17966, 258241, 3982123, 64566869, 1062867065, 17593640188, 292154717629, 4857706850275, 80811430420141, 1344642018311307, 22376108531437995, 372374332797700997, 6197024056292073136

Offset

1,1

Comments

Column 7 of A317125.

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

Crossrefs

Cf. A317125.

Sequence in context: A304309 A316208 A305775 * A305592 A317010 A316875

Adjacent sequences: A317121 A317122 A317123 * A317125 A317126 A317127

Keyword

nonn

Author

R. H. Hardin, Jul 21 2018

Status

approved