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A183317
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Number of nX5 binary arrays with an element zero only if there are an even number of ones to its left and an even number of ones above it
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1
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13, 57, 377, 1975, 11385, 61755, 343035, 1872913, 10288475, 56225061, 307755285, 1681755047, 9194060283, 50235380141, 274514218163, 1499800424044, 8194423899045, 44768307376625, 244584423489933, 1336207363455509
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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)=a(n-1)+61*a(n-2)-29*a(n-3)-1491*a(n-4)+297*a(n-5)+19701*a(n-6)-1185*a(n-7)-159127*a(n-8)-819*a(n-9)+836109*a(n-10)+27171*a(n-11)-2951431*a(n-12)-125221*a(n-13)+7095801*a(n-14)+329665*a(n-15)-11617381*a(n-16)-586437*a(n-17)+12793417*a(n-18)+723297*a(n-19)-9246383*a(n-20)-590475*a(n-21)+4223841*a(n-22)+294743*a(n-23)-1155939*a(n-24)-81687*a(n-25)+173913*a(n-26)+10715*a(n-27)-12215*a(n-28)-423*a(n-29)+281*a(n-30)-a(n-31)-a(n-32)
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EXAMPLE
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Some solutions for 5X5
..0..0..1..1..0....1..1..0..0..0....0..0..0..0..0....0..0..0..0..1
..0..0..1..1..1....1..1..0..0..0....0..0..1..1..1....0..0..0..1..1
..0..0..0..0..1....0..0..0..0..0....0..0..1..1..1....0..0..0..1..1
..0..1..1..0..0....0..0..0..1..1....0..1..1..0..1....1..1..0..0..1
..0..1..1..0..1....0..0..0..1..1....1..1..1..1..1....1..1..0..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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