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A123124
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Sequence gives values of k in A122483.
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1
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2, 4, 5, 6, 4, 4, 6, 6, 8, 11, 13, 6, 13, 4
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,1
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LINKS
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MATHEMATICA
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f[p_, e_] := (p^(e+1)-2*p+1) * (p^(e+1)-1)/((p-1)^2 * (p^e - 1)); s[n_] := (Times @@ f @@@ FactorInteger[n])/n; Select[s /@ Range[2, 10^5], IntegerQ] (* Amiram Eldar, Sep 19 2022 *)
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CROSSREFS
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KEYWORD
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nonn,more
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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