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A297525
Number of 7Xn 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1 or 3 neighboring 1s.
1
1, 276, 8931, 80436, 956810, 22251457, 424461759, 6257746155, 99189736172, 1760551954224, 30190892195574, 493945062481322, 8201194302960825, 138921386338813051, 2337797782100665953, 39010588017713112465
OFFSET
1,2
COMMENTS
Row 7 of A297519.
LINKS
EXAMPLE
Some solutions for n=4
..0..1..0..0. .1..0..0..0. .1..1..0..0. .0..0..0..0. .0..1..1..1
..1..0..0..0. .1..1..0..0. .1..0..1..1. .0..0..0..1. .0..1..0..0
..0..0..0..1. .1..0..0..0. .0..0..0..1. .0..1..1..0. .0..0..0..0
..0..0..1..0. .0..0..0..0. .0..1..0..1. .0..1..0..0. .0..0..1..0
..0..0..0..0. .0..1..1..1. .0..0..1..1. .0..0..0..0. .1..1..0..0
..0..0..0..0. .0..0..0..1. .0..0..0..0. .1..0..0..1. .0..0..1..1
..0..0..0..0. .1..1..0..0. .0..0..1..1. .1..1..1..1. .0..0..0..1
CROSSREFS
Cf. A297519.
Sequence in context: A007246 A107080 A333049 * A169976 A297755 A166192
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 31 2017
STATUS
approved