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A282436
Number of nX3 0..1 arrays with no 1 equal to more than three of its king-move neighbors, with the exception of exactly one element.
1
0, 2, 96, 784, 6498, 50962, 378380, 2744000, 19498404, 136375750, 942366144, 6447489300, 43752057470, 294860178246, 1975527311278, 13168916586328, 87397738603826, 577783360045754, 3806594222800152, 25002061781815280
OFFSET
1,2
COMMENTS
Column 3 of A282441.
LINKS
FORMULA
Empirical: a(n) = 10*a(n-1) -15*a(n-2) -8*a(n-3) -293*a(n-4) +94*a(n-5) -343*a(n-6) +1808*a(n-7) -899*a(n-8) +3346*a(n-9) -4057*a(n-10) +4868*a(n-11) -7835*a(n-12) +4150*a(n-13) -8245*a(n-14) +3588*a(n-15) -4044*a(n-16) +496*a(n-17) -16*a(n-18)
EXAMPLE
Some solutions for n=4
..1..0..1. .0..1..0. .0..1..1. .0..0..1. .1..0..1. .0..0..1. .0..1..0
..0..1..1. .1..1..0. .1..1..0. .0..1..1. .1..1..1. .1..1..1. .0..1..0
..0..0..1. .0..1..0. .1..0..0. .1..0..1. .0..0..0. .0..0..1. .0..1..1
..1..0..1. .1..1..0. .1..0..1. .0..0..0. .0..1..1. .0..0..1. .1..1..0
CROSSREFS
Cf. A282441.
Sequence in context: A324165 A266831 A281029 * A069121 A362406 A157065
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 15 2017
STATUS
approved