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A303327
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Number of 5Xn 0..1 arrays with every element equal to 0, 2, 4, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
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1
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16, 1, 16, 4, 64, 25, 368, 201, 2545, 1855, 21082, 17922, 193932, 178310, 1883444, 1798105, 18748029, 18258149, 188640260, 186011969, 1906833092, 1898120576, 19312818727, 19383847701, 195770541009, 198022534325, 1985235845500
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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) = 6*a(n-1) +12*a(n-2) -129*a(n-3) +69*a(n-4) +842*a(n-5) -1297*a(n-6) -839*a(n-7) +3412*a(n-8) -9036*a(n-9) +11871*a(n-10) +17108*a(n-11) -45954*a(n-12) +47570*a(n-13) -53012*a(n-14) -66076*a(n-15) +203444*a(n-16) -165552*a(n-17) +190584*a(n-18) +4296*a(n-19) -282112*a(n-20) +206832*a(n-21) -309856*a(n-22) +208160*a(n-23) -21344*a(n-24) +101312*a(n-25) -1024*a(n-26) +22336*a(n-27) -32256*a(n-28) +2560*a(n-29) -2816*a(n-30) +2816*a(n-31) +1536*a(n-32) +1024*a(n-33) -1024*a(n-34) for n>35
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EXAMPLE
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Some solutions for n=5
..0..0..1..0..0. .0..1..0..1..0. .0..0..0..1..0. .0..0..1..1..0
..0..0..1..0..0. .0..1..0..1..0. .1..0..1..1..1. .1..0..0..1..1
..0..1..0..1..0. .1..1..1..1..1. .0..0..0..0..0. .0..0..0..0..0
..0..0..1..0..0. .0..0..0..0..0. .1..1..1..0..1. .1..1..0..0..1
..1..0..0..0..1. .0..0..0..0..0. .0..1..0..0..0. .1..1..0..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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