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A302217
Number of 7Xn 0..1 arrays with every element equal to 0, 2 or 3 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
1
64, 21, 1065, 172, 6423, 8756, 55922, 465040, 1136003, 19265064, 60547641, 699553699, 3796928584, 26139308319, 214325335931, 1151196050162, 10992872734396, 60033419186727, 538343914163895, 3376563558675197
OFFSET
1,1
COMMENTS
Row 7 of A302212.
LINKS
EXAMPLE
Some solutions for n=5
..0..1..1..0..1. .0..0..0..1..1. .0..1..1..0..0. .0..0..1..1..0
..1..1..0..0..0. .1..0..1..1..1. .1..1..0..0..1. .1..0..0..1..1
..0..0..1..1..1. .1..0..0..1..0. .0..1..1..0..0. .1..0..0..1..0
..0..0..1..1..0. .0..0..1..1..0. .0..1..1..0..0. .1..0..0..1..1
..1..0..0..1..0. .0..0..1..1..0. .0..1..0..0..1. .1..0..1..1..1
..1..0..1..1..1. .0..0..1..1..0. .1..1..0..0..1. .1..0..0..1..0
..0..0..0..1..0. .1..0..0..1..1. .1..1..1..0..0. .0..0..0..1..0
CROSSREFS
Cf. A302212.
Sequence in context: A305039 A305585 A316692 * A302465 A303247 A302373
KEYWORD
nonn
AUTHOR
R. H. Hardin, Apr 03 2018
STATUS
approved