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A180774
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Number of distinct solutions of sum{i=1..3}(x(2i-1)*x(2i)) = 0 (mod n), with x() only in 1..n-1
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1
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0, 0, 5, 14, 42, 119, 253, 526, 944, 1702, 2655, 4510, 6284, 9867, 13519, 19980, 25128, 37286, 44562, 63802, 76850, 102370, 118591, 168208, 183320, 241554, 279852, 359754, 387016, 528861, 543620, 712450, 780810, 953120, 1025355, 1360255
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OFFSET
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1,3
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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 3 1..3 pairs = 0 (mod 4) are
(1*1 + 1*1 + 1*2) (1*1 + 1*1 + 2*3) (1*1 + 1*2 + 3*3) (1*1 + 1*3 + 2*2)
(1*1 + 2*3 + 3*3) (1*2 + 1*2 + 2*2) (1*2 + 1*3 + 1*3) (1*2 + 2*2 + 2*3)
(1*2 + 3*3 + 3*3) (1*3 + 1*3 + 2*3) (1*3 + 2*2 + 3*3) (2*2 + 2*2 + 2*2)
(2*2 + 2*3 + 2*3) (2*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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