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A147803
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Least m coprime to 5 minimizing A007947(m*(5^n-m)).
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5
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1, 1, 4, 49, 128, 9, 36864, 19332, 4508, 121, 2
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OFFSET
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1,3
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COMMENTS
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This is related to the abc conjecture: Since m is coprime to 5, it is also coprime to 5^n and thus to 5^n-m. Thus the squarefree kernel A007947(m*(5^n-m)*5^n) = 5*A007947(m*(5^n-m)).
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LINKS
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PROG
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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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STATUS
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approved
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