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A074827
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Numbers n such that tau(n) > tau(n+1) where tau(x) = A000005(x).
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6
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4, 6, 8, 10, 12, 16, 18, 20, 22, 24, 28, 30, 32, 36, 40, 42, 45, 46, 48, 50, 52, 54, 56, 58, 60, 64, 66, 68, 70, 72, 76, 78, 80, 81, 82, 84, 88, 90, 92, 96, 100, 102, 105, 106, 108, 110, 112, 114, 117, 120, 124, 126, 128, 130, 132, 136, 138, 140, 144, 148, 150, 152
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OFFSET
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1,1
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COMMENTS
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The sequence of n such that tau(n)<tau(n+1) seems also asymptotic to d*n. - Benoit Cloitre, Sep 07 2002
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LINKS
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FORMULA
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a(n) seems to be asymptotic to d*n with d=2.2... - Benoit Cloitre, Sep 07 2002
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MATHEMATICA
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Select[Range@ 152, DivisorSigma[0, #] > DivisorSigma[0, # + 1] &] (* Michael De Vlieger, Jul 03 2015 *)
Position[Partition[DivisorSigma[0, Range[200]], 2, 1], _?(#[[1]]>#[[2]]&), {1}, Heads->False]//Flatten (* Harvey P. Dale, Jan 17 2017 *)
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PROG
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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