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Search: id:A052106
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| A052106 |
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LCM of n and n-EulerPhi[n]. |
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+0
1
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| 0, 2, 3, 4, 5, 12, 7, 8, 9, 30, 11, 24, 13, 56, 105, 16, 17, 36, 19, 60, 63, 132, 23, 48, 25, 182, 27, 112, 29, 330, 31, 32, 429, 306, 385, 72, 37, 380, 195, 120, 41, 210, 43, 264, 315, 552, 47, 96, 49, 150, 969, 364, 53, 108, 165, 224, 399, 870, 59, 660, 61, 992, 189
(list; graph; listen)
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OFFSET
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1,2
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COMMENT
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See also A009195, A003277, A050384 when totient and cototient give results identical to each other. This sequence is not identical to A009262.
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FORMULA
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a(n)=LCM[n, A051953[n]]
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EXAMPLE
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n=255, Phi[n]=128, cototient[255]=255-128=127 LCM[255,127]=32385=a(255), while LCM[255,Phi[255]]=A009262[255]=128*255=32640; n=72, Phi[72]=24, A051953[72]=72-24=48, LCM[72,48]=144=a(72), while A009262[72]=LCM[72,24]=72
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CROSSREFS
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Cf. A000010, A051953, A009262.
Adjacent sequences: A052103 A052104 A052105 this_sequence A052107 A052108 A052109
Sequence in context: A014545 A065636 A135323 this_sequence A064446 A143482 A066574
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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), Jan 20 2000
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