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A166375
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a(n) = sum (floor (j^2/n)) taken over 1 <= j <= n-1.
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5
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0, 1, 3, 4, 7, 11, 16, 20, 24, 31, 39, 44, 53, 63, 74, 80, 92, 103, 117, 128, 141, 157, 174, 186, 200, 219, 237, 252, 273, 293, 316, 332, 352, 377, 403, 420, 445, 473, 500, 520, 548, 575, 607, 634, 663, 695, 730, 756, 786, 819, 853, 884, 921, 959, 998
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OFFSET
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2,3
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LINKS
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FORMULA
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MAPLE
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add( floor(j^2/n), j=1..n-1) ;
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MATHEMATICA
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Table[Sum[Floor[k^2/n], {k, 1, n - 1}], {n, 2, 100}] (* G. C. Greubel, May 10 2016 *)
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PROG
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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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