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A066813
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LCM(phi(n),phi(n+1)).
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5
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1, 2, 2, 4, 4, 6, 12, 12, 12, 20, 20, 12, 12, 24, 8, 16, 48, 18, 72, 24, 60, 110, 88, 40, 60, 36, 36, 84, 56, 120, 240, 80, 80, 48, 24, 36, 36, 72, 48, 80, 120, 84, 420, 120, 264, 506, 368, 336, 420, 160, 96, 312, 468, 360, 120, 72, 252, 812, 464, 240, 60, 180, 288, 96
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OFFSET
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1,2
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LINKS
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Harry J. Smith, Table of n, a(n) for n=1,...,1000
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MATHEMATICA
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LCM@@EulerPhi[#]&/@Partition[Range[100], 2, 1] (* From Harvey P. Dale, May 07 2011 *)
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PROG
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(PARI) { for (n=1, 1000, write("b066813.txt", n, " ", lcm(eulerphi(n), eulerphi(n+1))) ) } [From Harry J. Smith, Mar 29 2010]
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CROSSREFS
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Sequence in context: A128745 A188524 A126064 * A033732 A033752 A059886
Adjacent sequences: A066810 A066811 A066812 * A066814 A066815 A066816
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KEYWORD
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nonn
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AUTHOR
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Benoit Cloitre, Jan 20 2002
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STATUS
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approved
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