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Search: id:A140225
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| A140225 |
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a(n) = number of m's among (d(1),d(2),...,d(n)), where m is the maximum value of (d(1),d(2),...,d(n)), and d(n) is the number of divisors of n. |
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3
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| 1, 1, 2, 1, 1, 1, 1, 2, 2, 3, 3, 1, 1, 1, 1, 1, 1, 2, 2, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2
(list; graph; listen)
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OFFSET
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1,3
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EXAMPLE
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The sequence of the numbers of divisors of the first 11 positive integers is: 1,2,2,3,2,4,2,4,3,4,2.
The maximum value obtained here is 4. There are three 4's among (d(1),d(2),...,d(11)); so a(11)=3.
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MATHEMATICA
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a = {}; b = {}; For[n = 1, n < 80, n++, AppendTo[b, Length[Divisors[n]]]; AppendTo[a, Length[Select[b, # == Max[b] &]]]]; a - Stefan Steinerberger (stefan.steinerberger(AT)gmail.com), May 18 2008
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CROSSREFS
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Cf. A000005, A140223, A140224.
Adjacent sequences: A140222 A140223 A140224 this_sequence A140226 A140227 A140228
Sequence in context: A025876 A109035 A064823 this_sequence A104758 A143227 A026791
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KEYWORD
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nonn
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AUTHOR
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Leroy Quet (qq-quet(AT)mindspring.com), May 12 2008
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EXTENSIONS
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More terms from Stefan Steinerberger (stefan.steinerberger(AT)gmail.com), May 18 2008
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