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A318038 Number of nXn 0..1 arrays with every element unequal to 0, 2, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. 0
1, 2, 8, 140, 10563, 2098813, 1097286743, 1507709268026, 5360839557388973, 49384396585140778697 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Diagonal of A318045.
LINKS
EXAMPLE
Some solutions for n=5
..0..0..1..1..0. .0..1..0..0..0. .0..1..1..1..0. .0..1..0..1..0
..0..1..0..1..0. .1..1..1..1..1. .1..0..0..1..1. .1..1..0..0..1
..1..0..0..1..0. .0..0..1..0..1. .1..0..0..0..0. .0..0..0..1..0
..0..0..0..1..0. .1..0..0..0..0. .0..1..1..1..0. .0..1..1..1..0
..1..1..1..0..1. .0..1..1..0..1. .1..0..1..0..1. .1..0..0..0..1
CROSSREFS
Cf. A318045.
Sequence in context: A193203 A259126 A140050 * A304798 A154908 A166356
KEYWORD
nonn
AUTHOR
R. H. Hardin, Aug 13 2018
STATUS
approved

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Last modified June 23 01:45 EDT 2024. Contains 373629 sequences. (Running on oeis4.)