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A274801
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Number of n X 6 0..2 arrays with no element equal to any value at offset (-1,-2) (-2,-1) (0,-1) or (-1,0) and new values introduced in order 0..2.
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1
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16, 164, 1572, 16328, 169328, 1774372, 18476064, 193292660, 2016460140, 21072173792, 219985654388, 2297904486000, 23995177354892, 250610794543168, 2617142836973944, 27332712382107996, 285444819027741180
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OFFSET
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1,1
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COMMENTS
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LINKS
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FORMULA
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Empirical: a(n) = 2*a(n-1) +80*a(n-2) +140*a(n-3) -474*a(n-4) -998*a(n-5) -130*a(n-6) +781*a(n-7) +814*a(n-8) -79*a(n-9) -360*a(n-10) +54*a(n-11) +48*a(n-12) -52*a(n-13) +4*a(n-14) for n>15.
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EXAMPLE
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Some solutions for n=4
..0..1..0..1..0..2. .0..1..2..0..2..1. .0..1..2..1..2..1. .0..1..0..1..2..1
..1..2..1..2..1..0. .1..0..1..2..1..2. .1..2..1..0..1..0. .1..0..1..0..1..0
..0..1..0..1..0..1. .2..1..2..1..2..0. .2..1..0..1..2..1. .2..1..0..2..0..1
..2..0..1..0..1..0. .0..2..1..2..0..2. .1..0..1..2..1..0. .0..2..1..0..2..0
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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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