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A254736
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Number of (n+2)X(1+2) 0..1 arrays with every 3X3 subblock sum of the two medians of the central row and column minus the sum of the minimums of the diagonal and antidiagonal nondecreasing horizontally and vertically
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2
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512, 2848, 13504, 62579, 281213, 1223367, 5203324, 21804750, 90310600, 370603448, 1509199829, 6107273564, 24583109306, 98509547315, 393228178451, 1564462436101, 6206195362309, 24557505623608, 96955687292333
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OFFSET
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1,1
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COMMENTS
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Column 1 of A254743
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LINKS
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R. H. Hardin, Table of n, a(n) for n = 1..210
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FORMULA
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Empirical: a(n) = 9*a(n-1) -28*a(n-2) +46*a(n-3) -59*a(n-4) -81*a(n-5) +576*a(n-6) -1373*a(n-7) +2977*a(n-8) -4744*a(n-9) +6620*a(n-10) -10881*a(n-11) +14299*a(n-12) -20512*a(n-13) +28752*a(n-14) -21216*a(n-15) +5616*a(n-16) for n>20
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EXAMPLE
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Some solutions for n=4
..1..1..1....0..0..0....0..0..0....0..0..1....1..1..0....1..0..0....0..0..0
..0..1..0....0..0..1....1..0..0....1..0..0....0..0..0....0..1..0....0..0..1
..1..0..0....0..0..0....1..1..0....0..0..0....1..1..0....1..0..0....0..0..0
..1..1..1....1..0..0....1..0..0....0..0..1....0..0..1....1..0..0....0..1..0
..0..0..0....1..0..1....1..1..0....0..0..0....1..1..0....1..0..0....1..0..0
..1..1..1....1..1..1....0..1..1....1..0..0....0..1..1....1..0..1....1..0..1
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CROSSREFS
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Sequence in context: A254915 A257154 A254743 * A254586 A254361 A254354
Adjacent sequences: A254733 A254734 A254735 * A254737 A254738 A254739
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KEYWORD
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nonn
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AUTHOR
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R. H. Hardin, Feb 06 2015
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STATUS
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approved
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