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A255040
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Number of (5+2)X(n+2) 0..1 arrays with every 3X3 subblock sum of the two sums of the central row and central column minus the two minimums of the diagonal and antidiagonal nondecreasing horizontally, vertically and ne-to-sw antidiagonally
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1
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154680, 196724, 256941, 340084, 509796, 679364, 1001108, 1527986, 2511384, 2809624, 4351252, 6087760, 9523604, 11861776, 17669024, 24264636, 36530112, 46441548, 69037416, 93999336, 140746548, 181125992, 270554212, 368027184
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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) -2*a(n-3) +7*a(n-4) -11*a(n-5) -2*a(n-6) +12*a(n-7) -12*a(n-8) +9*a(n-9) +12*a(n-10) -16*a(n-11) -4*a(n-12) +14*a(n-13) -16*a(n-14) +16*a(n-16) -8*a(n-17) for n>33
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EXAMPLE
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Some solutions for n=2
..1..0..0..1....0..0..0..0....0..1..0..0....1..0..0..1....0..0..0..1
..0..0..0..1....1..0..0..1....1..0..1..0....0..0..0..1....0..0..0..0
..0..0..0..1....1..0..0..1....1..0..1..0....1..0..0..1....0..0..1..0
..0..1..0..1....1..0..1..1....0..1..0..1....1..0..0..0....1..0..0..1
..0..0..0..1....0..1..1..0....0..1..0..1....1..0..1..1....0..1..1..1
..0..1..1..0....1..1..0..1....1..0..1..1....1..1..1..1....1..1..1..1
..1..0..1..0....1..0..1..0....0..0..0..0....0..1..1..1....1..1..1..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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