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A254258
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Number of (n+2) X (6+2) 0..1 arrays with every 3 X 3 subblock sum of the two maximums of the diagonal and antidiagonal minus the sum of the minimums of the central row and column nondecreasing horizontally, vertically and ne-to-sw antidiagonally.
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1
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1021428, 10193041, 43088793, 49369118, 159041102, 325742026, 933774220, 3391678348, 9927463676, 34363573228, 120867828716, 419133745900, 1533506476524, 5688509028844, 21334401501676, 81613015824876
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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) = 5*a(n-1) +12*a(n-2) -48*a(n-3) -176*a(n-4) +80*a(n-5) +1792*a(n-6) +640*a(n-7) -6400*a(n-8) -10240*a(n-9) +14336*a(n-10) +32768*a(n-11) -32768*a(n-12) for n>20.
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EXAMPLE
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Some solutions for n=1
..0..0..0..0..0..1..0..1....0..0..0..0..1..1..0..0....0..0..1..1..1..0..1..0
..0..0..0..1..1..0..0..1....0..0..0..0..0..0..1..1....0..0..0..0..0..0..1..1
..0..1..1..0..1..1..1..1....0..0..1..1..0..0..1..1....1..1..1..1..1..1..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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