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Search: id:A136641
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| A136641 |
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a(n) = smallest positive integer that is coprime to n and has n positive divisors. |
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+0
1
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OFFSET
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1,2
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EXAMPLE
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The sequence of positive integers each with 9 divisors starts: 36, 100, 196, 225, 256,... Now 36 is not coprime to 9. But 100, the next bigger value with 9 divisors, is. So a(9) = 100.
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CROSSREFS
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Cf. A073904.
Sequence in context: A004735 A066830 A083061 this_sequence A053359 A056742 A041435
Adjacent sequences: A136638 A136639 A136640 this_sequence A136642 A136643 A136644
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KEYWORD
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more,nonn
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AUTHOR
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Leroy Quet (qq-quet(AT)mindspring.com), Apr 14 2008
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