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A318036 Number of nX7 0..1 arrays with every element unequal to 0, 1, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. 1
21, 91, 368, 1222, 6525, 32385, 204645, 1284756, 8133386, 51773454, 331053698, 2126470209, 13650378979, 87727825675, 563717129308, 3623363068053, 23291574091030, 149752468455094, 962944454411938, 6192412939272588 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 7 of A318037.
LINKS
EXAMPLE
Some solutions for n=5
..0..0..0..1..0..1..1. .0..0..1..0..1..0..1. .0..0..1..0..1..1..0
..0..0..0..0..1..1..0. .0..0..1..1..0..1..1. .0..0..1..1..1..1..1
..1..0..0..1..0..0..1. .1..0..0..0..0..0..1. .1..0..1..1..1..1..1
..0..0..0..1..0..1..0. .0..1..0..0..0..1..1. .0..0..0..1..0..1..1
..0..1..0..1..0..1..0. .1..1..1..0..0..0..1. .0..0..0..0..0..0..1
CROSSREFS
Cf. A318037.
Sequence in context: A203173 A194532 A065827 * A326164 A143843 A119109
KEYWORD
nonn
AUTHOR
R. H. Hardin, Aug 13 2018
STATUS
approved

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Last modified June 20 16:01 EDT 2024. Contains 373526 sequences. (Running on oeis4.)