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A231758
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Number of (n+1)X(2+1) 0..1 arrays with no element having a strict majority of its horizontal, diagonal and antidiagonal neighbors equal to one
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1
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33, 136, 660, 3213, 14989, 70927, 338352, 1603633, 7596720, 36066272, 171140301, 811651995, 3850637109, 18269376384, 86668158745, 411153474416, 1950577525332, 9253691650061, 43899995716425, 208265361505983, 988028267125504
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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) = 3*a(n-1) +47*a(n-3) -25*a(n-4) +21*a(n-5) -403*a(n-6) +110*a(n-7) +40*a(n-8) +1601*a(n-9) -348*a(n-10) -520*a(n-11) -2656*a(n-12) +792*a(n-13) +288*a(n-14) +2480*a(n-15) -544*a(n-16) +128*a(n-17) -1600*a(n-18) +128*a(n-19) +512*a(n-21)
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EXAMPLE
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Some solutions for n=6
..0..0..0....1..0..0....1..0..0....0..0..0....0..0..1....1..0..0....0..0..0
..1..0..1....1..1..0....0..1..1....1..0..0....0..0..0....1..0..0....1..0..1
..0..1..1....0..0..1....0..0..0....1..0..1....1..1..1....1..1..0....1..0..0
..0..0..0....0..0..1....1..0..0....0..0..0....0..0..1....1..0..0....0..0..0
..0..0..0....1..0..0....1..0..0....1..0..0....0..0..0....1..0..0....0..1..0
..1..1..0....0..1..1....0..0..0....0..1..1....1..0..1....0..1..1....0..0..0
..0..0..1....0..0..0....1..1..0....0..0..1....0..1..0....1..0..0....1..0..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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