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A180820
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Number of distinct solutions of sum{i=1..8}(x(2i-1)*x(2i)) = 0 (mod n), with x() only in 2..n-2
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1
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0, 0, 0, 1, 5, 267, 3470, 43311, 345834, 2444098, 13182592, 64230756, 260084531, 976064810, 3209275269, 9963090038, 27970062442, 75278021479, 187003944842, 450006340740, 1014913338398, 2232744286681, 4653016292419, 9520091930911
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OFFSET
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1,5
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COMMENTS
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LINKS
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EXAMPLE
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Solutions for sum of products of 8 2..3 pairs = 0 (mod 5) are
(2*2 + 2*2 + 2*2 + 2*2 + 2*3 + 2*3 + 2*3 + 2*3)
(2*2 + 2*2 + 2*2 + 2*3 + 2*3 + 2*3 + 2*3 + 3*3)
(2*2 + 2*2 + 2*3 + 2*3 + 2*3 + 2*3 + 3*3 + 3*3)
(2*2 + 2*3 + 2*3 + 2*3 + 2*3 + 3*3 + 3*3 + 3*3)
(2*3 + 2*3 + 2*3 + 2*3 + 3*3 + 3*3 + 3*3 + 3*3)
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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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