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A052100
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a(n)=LCM[n, EulerPhi[n], n-EulerPhi[n]].
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0
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0, 2, 6, 4, 20, 12, 42, 8, 18, 60, 110, 24, 156, 168, 840, 16, 272, 36, 342, 120, 252, 660, 506, 48, 100, 1092, 54, 336, 812, 1320, 930, 32, 8580, 2448, 9240, 72, 1332, 3420, 1560, 240, 1640, 420, 1806, 1320, 2520, 6072, 2162, 96, 294, 300, 31008, 2184, 2756
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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FORMULA
| a(n)=LCM[n, A000010[n], A051953[n]]
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EXAMPLE
| n=255, Phi[255]=128, cototient[255]=127, LCM[255,128,127]=4145280-a(255) n=72, Phi[72]=24, cototient[72]=48, LCM[72,24,48]=144=a(72) n=p, prime, Phi[p]=p-1, cototient[p]=p-1, a(p)=p(p-1)=A009262(p)
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CROSSREFS
| A000010, A051953, A009262.
Sequence in context: A127699 A124838 A088659 * A079579 A112326 A075435
Adjacent sequences: A052097 A052098 A052099 * A052101 A052102 A052103
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KEYWORD
| nonn
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AUTHOR
| Labos E. (labos(AT)ana.sote.hu), Jan 20 2000
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