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A279658
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Number of 2Xn 0..2 arrays with no element equal to a strict majority of its horizontal and antidiagonal neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.
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1
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0, 3, 27, 254, 2301, 19053, 149696, 1124969, 8178511, 57898166, 401186545, 2731110793, 18318459744, 121328163101, 794920836163, 5159325575790, 33210311871861, 212217346520565, 1347303236328128, 8503951716838241
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OFFSET
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1,2
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COMMENTS
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LINKS
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FORMULA
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Empirical: a(n) = 17*a(n-1) -90*a(n-2) +75*a(n-3) +591*a(n-4) -924*a(n-5) -1263*a(n-6) +2511*a(n-7) +810*a(n-8) -2675*a(n-9) +409*a(n-10) +924*a(n-11) -464*a(n-12) +64*a(n-13)
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EXAMPLE
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Some solutions for n=4
..0..1..2..0. .0..1..1..0. .0..0..1..0. .0..1..1..1. .0..1..1..0
..2..2..1..1. .1..0..0..2. .0..2..2..0. .0..2..0..0. .1..0..0..1
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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