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A303689
Number of nX7 0..1 arrays with every element unequal to 2, 3 or 4 king-move adjacent elements, with upper left element zero.
1
0, 702, 191, 5563, 4619, 55382, 99205, 713542, 1964803, 10454428, 36456925, 170495722, 667372121, 2966797695, 12357633485, 53847703784, 232236213151, 1006212092360, 4425027446469, 19184005184192, 85271913119853
OFFSET
1,2
COMMENTS
Column 7 of A303690.
LINKS
EXAMPLE
Some solutions for n=5
..0..1..1..1..0..1..0. .0..1..1..0..0..1..0. .0..1..1..0..1..1..0
..1..0..0..0..1..1..1. .1..0..0..0..1..1..0. .0..1..1..0..0..0..1
..0..1..0..0..1..1..0. .1..0..0..1..1..1..0. .1..1..1..0..0..1..0
..1..1..1..0..1..1..0. .0..0..0..1..1..0..0. .0..1..0..0..1..1..1
..0..1..0..1..0..0..1. .1..1..1..0..0..0..1. .1..0..0..1..0..1..0
CROSSREFS
Cf. A303690.
Sequence in context: A031423 A140433 A316969 * A252567 A252574 A252575
KEYWORD
nonn
AUTHOR
R. H. Hardin, Apr 28 2018
STATUS
approved