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A254844
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Number of (n+2)X(7+2) 0..1 arrays with every 3X3 subblock sum of the medians of the diagonal and antidiagonal minus the two sums of the central row and column nondecreasing horizontally and vertically
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1
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794128, 1323795, 1795490, 3986282, 7695684, 15676281, 29838772, 55992976, 100413564, 176175692, 297995148, 493162840, 792361276, 1249168284, 1921781524, 2908426536, 4313307192, 6311925400, 9077791868, 12909434532, 18083815180
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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) = 10*a(n-1) -45*a(n-2) +120*a(n-3) -202*a(n-4) +172*a(n-5) +150*a(n-6) -840*a(n-7) +1619*a(n-8) -1846*a(n-9) +959*a(n-10) +960*a(n-11) -3000*a(n-12) +3952*a(n-13) -3352*a(n-14) +1920*a(n-15) -720*a(n-16) +160*a(n-17) -16*a(n-18) for n>53
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EXAMPLE
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Some solutions for n=1
..0..0..0..1..0..1..0..0..0....0..0..0..1..1..0..0..0..0
..1..0..1..0..0..0..0..0..0....1..1..1..0..0..1..0..0..0
..0..0..1..0..1..0..0..0..0....0..0..0..0..0..0..0..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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