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A034753
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Dirichlet convolution of 3^(n-1) with sigma(n).
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0
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1, 6, 13, 43, 87, 294, 737, 2304, 6610, 19962, 59061, 178111, 531455, 1596558, 4783371, 14355733, 43046739, 129161004, 387420509, 1162321341, 3486787421, 10460530422, 31381059633, 94143721320, 282429536998, 847290203850
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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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Table[Sum[DivisorSigma[1, n/d]*3^(d - 1), {d, Divisors[n]}], {n, 1, 25}] (* Vaclav Kotesovec, Sep 10 2019 *)
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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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