A320370 Number of nX7 0..1 arrays with every element unequal to 0, 1, 2, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

64, 8192, 569608, 37398884, 2486026176, 165355751224, 10993944343316, 731023916987668, 48608312646628816, 3232138361835207448, 214916439617787409844, 14290565387888543489420, 950231025365163583436224

Offset

1,1

Comments

Column 7 of A320371.

Links

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

Example

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

Crossrefs

Cf. A320371.

Sequence in context: A208714 A316959 A316814 * A298969 A317564 A299739

Adjacent sequences: A320367 A320368 A320369 * A320371 A320372 A320373

Keyword

nonn

Author

R. H. Hardin, Oct 11 2018

Status

approved