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A283686
Number of nX3 0..1 arrays with no 1 equal to more than two of its horizontal, diagonal and antidiagonal neighbors.
1
8, 49, 264, 1525, 8732, 49924, 285770, 1635402, 9359104, 53561285, 306524651, 1754204129, 10039103443, 57452599764, 328794429339, 1881651609689, 10768469471919, 61626676386770, 352682175698390, 2018358353003843
OFFSET
1,1
COMMENTS
Column 3 of A283691.
LINKS
FORMULA
Empirical: a(n) = 5*a(n-1) +2*a(n-2) +14*a(n-3) -9*a(n-4) +2*a(n-5) -45*a(n-6) -20*a(n-7) -6*a(n-8) +24*a(n-9) +40*a(n-10)
EXAMPLE
Some solutions for n=4
..0..0..0. .1..0..0. .0..0..1. .0..0..1. .0..0..0. .1..0..1. .1..1..0
..0..0..0. .0..0..0. .0..1..0. .0..0..1. .1..0..0. .0..1..0. .0..1..1
..1..1..0. .1..0..0. .0..0..1. .1..0..0. .0..0..0. .0..1..0. .0..0..0
..0..0..1. .0..1..0. .1..0..0. .0..0..0. .0..1..1. .0..0..0. .0..1..0
CROSSREFS
Cf. A283691.
Sequence in context: A344321 A166789 A081901 * A026389 A005059 A026719
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 14 2017
STATUS
approved