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Search: id:A073764
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| A073764 |
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a(n) = least number x such that A045763(x)=n or 0 if no such number exists. |
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+0
1
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| 6, 0, 10, 15, 14, 21, 18, 35, 22, 33, 26, 39, 0, 65, 30, 36, 38, 57, 44, 95, 46, 63, 42, 115, 50, 64, 58, 87, 54, 75, 68, 155, 60, 99, 74, 111, 72, 185, 66, 117, 86, 129, 92, 215, 94, 141, 78, 235, 84, 105, 98, 100, 96, 265, 90, 135, 118, 147, 122, 183, 108, 305, 102
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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A070297 without its term a(0). [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Sep 23 2008]
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EXAMPLE
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A045763(x)=5 first holds if x=14 because unrelated set of 14={4,6,8,10,12} has 5 entries. No solutions were found for n=2,13,67,93 when tested at <100000.
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MATHEMATICA
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t=Table[0, {100}]; Do[s=n+1-DivisorSigma[0, n]-EulerPhi[n]; If[s<101&&t[[s]]==0, t[[s]]=n], {n, 1, 100000}]; t
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CROSSREFS
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Cf. A045763, A073757-A073766.
Sequence in context: A019622 A083573 A117006 this_sequence A158897 A033458 A028651
Adjacent sequences: A073761 A073762 A073763 this_sequence A073765 A073766 A073767
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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 08 2002
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