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A301911
Number of 7Xn 0..1 arrays with every element equal to 0, 2 or 3 horizontally or antidiagonally adjacent elements, with upper left element zero.
1
64, 1, 117, 65, 196, 1999, 8781, 104732, 770376, 7398173, 75183520, 712349998, 7178506389, 72042620797, 721879978606, 7250047119979, 72777298549367, 730558484014599, 7332580130417856, 73594615185044259, 738663477116841069
OFFSET
1,1
COMMENTS
Row 7 of A301906.
LINKS
EXAMPLE
Some solutions for n=5
..0..1..1..0..0. .0..1..1..0..0. .0..1..1..0..0. .0..1..1..0..1
..1..1..0..0..1. .1..1..0..0..1. .1..1..0..0..1. .1..1..1..0..1
..1..1..1..0..1. .1..1..0..0..0. .1..1..1..0..1. .0..1..1..0..1
..1..1..1..0..0. .1..1..1..0..0. .0..1..1..0..0. .0..1..1..0..0
..0..1..0..0..0. .1..1..0..0..1. .0..1..0..0..1. .1..1..0..0..1
..1..1..1..0..0. .0..1..1..0..0. .1..1..1..0..0. .0..1..1..0..0
..1..1..0..0..1. .1..1..0..0..1. .1..1..0..0..1. .1..1..0..0..1
CROSSREFS
Cf. A301906.
Sequence in context: A203262 A174927 A303329 * A302155 A351246 A371277
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 28 2018
STATUS
approved