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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
OFFSET
1,1
COMMENTS
Column 7 of A318016.
LINKS
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
KEYWORD
nonn
AUTHOR
R. H. Hardin, Aug 12 2018
STATUS
approved