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A294608
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a(n) = Sum_{d|n} d^(d + 1 + n/d).
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3
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1, 17, 244, 4129, 78126, 1680410, 40353608, 1073758337, 31381061797, 1000000390882, 34522712143932, 1283918474699170, 51185893014090758, 2177953338091847410, 98526125335695332184, 4722366482878235412481, 239072435685151324847154
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OFFSET
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1,2
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LINKS
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MATHEMATICA
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a[n_] := DivisorSum[n, #^(# + 1 + n/#) &]; Array[a, 17] (* Amiram Eldar, Oct 04 2023 *)
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PROG
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(PARI) {a(n) = sumdiv(n, d, d^(d+1+n/d))}
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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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