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A318015 Number of nX7 0..1 arrays with every element unequal to 0, 1, 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. 1
64, 4105, 37700, 603215, 7960400, 109443619, 1493271874, 20443576030, 279709797313, 3828247661823, 52400061484204, 717264682586055, 9818436168350577, 134403118254988711, 1839845040971963605 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A318016.

LINKS

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

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A318016.

Sequence in context: A324493 A324490 A262396 * A320401 A203438 A264345

Adjacent sequences:  A318012 A318013 A318014 * A318016 A318017 A318018

KEYWORD

nonn

AUTHOR

R. H. Hardin, Aug 12 2018

STATUS

approved

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Last modified August 25 21:00 EDT 2019. Contains 326324 sequences. (Running on oeis4.)