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A208266
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Number of nX5 0..1 arrays with new values 0..1 introduced in row major order and no element equal to more than two of its immediate leftward or upward or left-upward diagonal neighbors
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1
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16, 317, 6631, 137845, 2867739, 59655167, 1240971177, 25815151595, 537016650729, 11171225344081, 232388094425359, 4834225856311743, 100563411775559793, 2091958482792842737, 43517718984137019457, 905272203611654999429
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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) = 21*a(n-1) +9*a(n-2) -278*a(n-3) +73*a(n-4) +790*a(n-5) -662*a(n-6) +29*a(n-7) +69*a(n-8) -10*a(n-9)
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EXAMPLE
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Some solutions for n=4
..0..0..1..0..0....0..1..1..0..0....0..0..0..0..0....0..1..1..1..1
..1..1..1..1..0....0..1..0..0..1....1..1..0..1..0....1..0..0..0..0
..1..0..1..0..0....1..0..0..1..1....1..0..1..1..1....1..1..1..1..0
..1..1..1..0..1....0..1..1..0..0....1..1..1..0..1....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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