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A072073
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Number of solutions to Cototient(x)=A051953[x]= 2^n.
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0
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1, 2, 3, 3, 4, 4, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 10
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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EXAMPLE
| InvCototient[2^0] has infinite number of entries, so 2^0=1 is left out. n=14: 2^14=16384, InvCototient[16384]= {24576,28672,31744,32512,32764,32768}, so a(14)=6; a(n) increases at A000043(n).
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CROSSREFS
| Cf. A051953, A058764, A000043, A063740.
Sequence in context: A073933 A056792 A130500 * A061716 A126236 A073047
Adjacent sequences: A072070 A072071 A072072 * A072074 A072075 A072076
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KEYWORD
| nonn
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AUTHOR
| Labos E. (labos(AT)ana.sote.hu), Jun 13 2002
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