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A344509
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a(n) = (1/n) * Sum_{k=1..n} k * lcm(k,n).
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1
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1, 3, 8, 16, 35, 45, 98, 116, 183, 215, 396, 316, 663, 609, 750, 912, 1513, 1107, 2128, 1560, 2135, 2453, 3818, 2428, 4325, 4095, 4914, 4452, 7743, 4425, 9486, 7280, 8613, 9299, 10640, 8088, 16243, 13053, 14378, 12100, 22181, 12663, 25628, 17996, 19305, 23345, 33558, 19200, 34251, 26075
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OFFSET
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1,2
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LINKS
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FORMULA
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MATHEMATICA
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a[n_] := Sum[k * LCM[k, n], {k, 1, n}]/n; Array[a, 50] (* Amiram Eldar, May 21 2021 *)
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PROG
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(PARI) a(n) = sum(k=1, n, k*lcm(k, n))/n;
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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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