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A253840
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Number of (n+2)X(7+2) 0..1 arrays with every 3X3 subblock diagonal sum plus antidiagonal sum nondecreasing horizontally, vertically and ne-to-sw antidiagonally
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1
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709704, 697720, 1364704, 2282367, 350208, 427510, 262418, 145955, 159924, 165378, 151496, 166465, 184418, 173844, 187098, 210280, 195700, 212600, 237946, 221027, 242064, 271568, 250134, 276274, 302350, 286349, 315658, 340910, 325612, 359818
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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) = 2*a(n-1) -a(n-2) +2*a(n-6) -4*a(n-7) +3*a(n-8) -2*a(n-9) +a(n-10) -a(n-12) +2*a(n-13) -3*a(n-14) +4*a(n-15) -2*a(n-16) +a(n-20) -2*a(n-21) +a(n-22) for n>35
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EXAMPLE
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Some solutions for n=1
..0..0..0..1..1..0..0..0..1....0..0..1..0..1..1..0..0..0
..0..0..0..0..0..1..1..1..1....0..0..1..0..1..1..1..1..1
..1..0..1..1..0..0..0..1..0....0..0..1..1..0..0..1..1..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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