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A279867
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Number of nX3 0..2 arrays with no element unequal to a strict majority of its horizontal and vertical 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, 33, 176, 824, 3199, 11983, 42296, 143968, 476675, 1543667, 4909096, 15379744, 47578031, 145603087, 441441920, 1327480296, 3963270819, 11757089555, 34678442976, 101761151096, 297221474943, 864446263551, 2504466596040
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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) = 7*a(n-1) -13*a(n-2) -3*a(n-3) +13*a(n-4) +11*a(n-5) +29*a(n-6) -49*a(n-7) -8*a(n-8) -38*a(n-9) +28*a(n-10) +8*a(n-11) +16*a(n-12) for n>18
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EXAMPLE
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Some solutions for n=4
..0..1..1. .0..0..0. .0..0..0. .0..1..1. .0..0..1. .0..0..1. .0..0..1
..0..1..2. .1..2..2. .0..0..1. .1..1..1. .1..0..1. .0..0..0. .1..1..1
..1..1..2. .2..2..2. .0..0..0. .1..1..0. .0..0..0. .2..2..2. .1..1..0
..1..1..2. .2..0..2. .1..1..1. .1..1..1. .0..0..0. .2..2..2. .1..1..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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