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A320408
Number of nX7 0..1 arrays with every element unequal to 0, 1, 2, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
1
64, 700, 7049, 92578, 1353623, 19677729, 282206549, 4085687781, 58997871413, 854291464126, 12364136018320, 178956311530396, 2590922938391319, 37511252836334859, 543116212765934101, 7863666564278921803
OFFSET
1,1
COMMENTS
Column 7 of A320409.
LINKS
EXAMPLE
Some solutions for n=5
..0..0..0..1..1..1..0. .0..0..0..0..1..1..1. .0..0..0..1..1..1..1
..0..0..0..1..0..1..0. .0..0..1..0..1..0..1. .0..0..1..0..0..1..1
..0..1..1..1..0..0..1. .0..1..1..0..0..1..0. .0..1..0..1..1..1..1
..0..1..0..0..0..0..0. .0..0..0..0..0..0..0. .0..1..0..1..1..1..0
..0..0..1..0..0..0..1. .0..0..1..0..0..0..1. .0..1..1..1..0..1..1
CROSSREFS
Cf. A320409.
Sequence in context: A187620 A119287 A318023 * A223963 A372844 A303726
KEYWORD
nonn
AUTHOR
R. H. Hardin, Oct 12 2018
STATUS
approved