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A231265
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Number of (3+1)X(n+1) 0..2 arrays with no element unequal to a strict majority of its horizontal and antidiagonal neighbors, with values 0..2 introduced in row major order
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1
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22, 89, 304, 1253, 5109, 21894, 94234, 411978, 1804685, 7941968, 34969518, 154177482, 679856170, 2999022193, 13230140405, 58371368067, 257539346061, 1136325839478, 5013778949950, 22122400344087, 97611358054570
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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) = 9*a(n-1) -20*a(n-2) -36*a(n-3) +220*a(n-4) -282*a(n-5) -226*a(n-6) +1107*a(n-7) -1331*a(n-8) +254*a(n-9) +1022*a(n-10) -257*a(n-11) -2156*a(n-12) +2602*a(n-13) +2385*a(n-14) -8433*a(n-15) +7492*a(n-16) -959*a(n-17) -1626*a(n-18) -531*a(n-19) -3536*a(n-20) +3860*a(n-21) -2019*a(n-22) +4258*a(n-23) -1660*a(n-24) +328*a(n-25) -368*a(n-26) -96*a(n-27) for n>28
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EXAMPLE
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Some solutions for n=3
..0..0..0..0....0..0..0..0....0..0..0..0....0..0..1..1....0..0..1..1
..1..1..1..1....1..1..0..0....0..0..0..0....0..1..1..1....0..1..0..0
..2..2..2..2....1..0..0..0....0..0..0..1....1..2..2..2....1..0..0..2
..2..2..2..2....2..2..2..2....0..0..1..1....2..2..2..2....2..2..2..2
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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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