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1, 2, 3, 3, 5, 6, 7, 7, 7, 10, 11, 7, 13, 14, 15, 15, 17, 14, 19, 15, 21, 22, 23, 21, 23, 26, 26, 21, 29, 30, 31, 31, 33, 34, 35, 21, 37, 38, 39, 35, 41, 42, 43, 33, 35, 46, 47, 35, 47, 46, 51, 39, 53, 39, 55, 47, 57, 58, 59, 35, 61, 62, 47, 62, 65, 66, 67, 51, 69, 70, 71, 47, 73
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,2
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COMMENTS
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Different from A081213 (see example).
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LINKS
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EXAMPLE
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Recall that A081210 = (in prime factorization of n: replace each prime power p^e = by the greatest squarefree number <= p^e)
Consider n = 84 = 2*2*3*7
Therefore a(84) <> A081213(84), 49 <> 47.
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MAPLE
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end proc:
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MATHEMATICA
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gsf[n_] := For[k = n, True, k--, If[SquareFreeQ[k], Return[k]]];
A081210[n_] := Times @@ gsf /@ Power @@@ FactorInteger[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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