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A257359
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Number of (n+2)X(6+2) 0..1 arrays with no 3x3 subblock diagonal sum equal to the antidiagonal sum or central row sum less than the central column sum
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1
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174724, 145924, 234256, 622521, 1196836, 2433600, 6012304, 15547249, 31606884, 64818601, 152028900, 378341401, 795240000, 1701645001, 3917508100, 9407060100, 20173089024, 44278259776, 100259623044, 236166840900, 512492764996
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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) = 4*a(n-2) +17*a(n-4) -57*a(n-6) +2*a(n-8) -60*a(n-10) -127*a(n-12) +598*a(n-14) -292*a(n-16) +315*a(n-18) +312*a(n-20) -1149*a(n-22) +223*a(n-26) -55*a(n-28) +127*a(n-30) +51*a(n-32) -32*a(n-34) -6*a(n-36) -5*a(n-38) -a(n-40) +a(n-42) for n>48
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EXAMPLE
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Some solutions for n=2
..0..0..0..1..0..0..0..1....1..0..0..1..1..0..0..0....0..1..0..0..0..1..1..0
..1..0..0..1..1..0..0..1....1..0..1..1..0..0..0..0....0..0..1..1..1..0..1..1
..1..1..0..0..1..1..0..0....0..1..1..0..0..0..0..1....1..0..0..1..1..1..0..1
..1..1..1..0..0..1..0..1....1..0..0..0..0..0..1..1....1..0..0..0..1..1..0..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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