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A063740
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Number of entries in InverseCototient[n].
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5
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1, 1, 2, 1, 1, 2, 3, 2, 0, 2, 3, 2, 1, 2, 3, 3, 1, 3, 1, 3, 1, 4, 4, 3, 0, 4, 1, 4, 3, 3, 4, 3, 0, 5, 2, 2, 1, 4, 1, 5, 1, 4, 2, 4, 2, 6, 5, 5, 0, 3, 0, 6, 2, 4, 2, 5, 0, 7, 4, 3, 1, 8, 4, 6, 1, 3, 1, 5, 2, 7, 3, 5, 1, 7, 1, 8, 1, 5, 2, 6, 1, 9, 2, 6, 0, 4, 2, 10, 2, 4, 2, 5, 2, 7, 5, 4, 1, 8, 0, 9, 1, 6, 1, 7
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OFFSET
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2,3
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LINKS
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T. D. Noe, Table of n, a(n) for n=2..10000
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EXAMPLE
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At n=1 InvCototient[1] has infinite number of elements, so skipped; n=101, InvCototient[101]={485,1157,1577,1817,2117,2201,2501,2537,10201}, including a(101)=8 terms; e.g. 485-Phi[485]=485-384=101. n=102, InvCototient[102]={202} has a(102)=1 number so that 202-Phi[202]=102.
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CROSSREFS
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Cf. A000010, A051953, A063507.
Cf. A063748 (greatest solution to x-phi(x)=n)
Sequence in context: A133771 A217612 A029254 * A072782 A122563 A204030
Adjacent sequences: A063737 A063738 A063739 * A063741 A063742 A063743
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KEYWORD
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nonn
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AUTHOR
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Labos E. (labos(AT)ana.sote.hu), Aug 13 2001
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STATUS
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approved
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