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A289186
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The arithmetic function v_4(n,5).
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0
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0, 1, 0, 1, 2, 2, 1, 3, 2, 2, 4, 3, 4, 5, 3, 4, 6, 4, 4, 7, 4, 5, 8, 5, 6, 9, 8, 6, 10, 6, 6, 11, 8, 10, 12, 8, 8, 13, 8, 8, 14, 9, 8, 15, 10, 10, 16, 14, 10, 17, 12, 11, 18, 11, 16, 19, 12, 12, 20, 12, 12, 21, 12, 15, 22, 14, 16, 23, 20
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OFFSET
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2,5
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REFERENCES
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J. Butterworth, Examining the arithmetic function v_g(n,h). Research Papers in Mathematics, B. Bajnok, ed., Gettysburg College, Vol. 8 (2008).
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LINKS
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MATHEMATICA
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v[g_, n_, h_] := (d = Divisors[n]; Max[(Floor[(d - 1 - GCD[d, g])/h] + 1)*n/d]); Table[v[4, n, 5], {n, 2, 70}]
a[n_]:=n*Max[Table[(Floor[(d - 1 - GCD[d, 4])/5] + 1)/d, {d, Divisors[n]}]]; Table[a[n], {n, 2, 100}] (* Vincenzo Librandi, Aug 17 2017 *)
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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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