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A014573
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Smallest k such that phi(x) = k has exactly n solutions.
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6
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3, 0, 1, 2, 4, 8, 12, 32, 36, 40, 24, 48, 160, 396, 2268, 704, 312, 72, 336, 216, 936, 144, 624, 1056, 1760, 360, 2560, 384, 288, 1320, 3696, 240, 768, 9000, 432, 7128, 4200, 480, 576, 1296, 1200, 15936, 3312, 3072, 3240, 864, 3120, 7344, 3888, 720, 1680
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,1
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COMMENTS
| Carmichael conjectured that no term exists for n=1.
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REFERENCES
| M. Abramowitz and I. A. Stegun, eds., Handbook of Mathematical Functions, National Bureau of Standards Applied Math. Series 55, 1964 (and various reprintings), p. 840.
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LINKS
| M. Abramowitz and I. A. Stegun, eds., Handbook of Mathematical Functions, National Bureau of Standards, Applied Math. Series 55, Tenth Printing, 1972 [alternative scanned copy].
Eric Weisstein's World of Mathematics, Carmichael's Totient Function conjecture
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CROSSREFS
| Cf. A000010. Essentially same as A007374, which is the main entry for this sequence.
Sequence in context: A136748 A049765 A194801 * A067166 A125209 A071818
Adjacent sequences: A014570 A014571 A014572 * A014574 A014575 A014576
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KEYWORD
| nonn,easy
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AUTHOR
| Eric Weisstein (eric(AT)weisstein.com)
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EXTENSIONS
| Link fixed by Charles R Greathouse IV (charles.greathouse(AT)case.edu), Oct 06 2009
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