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%I A135060
%S A135060 1,2,6,12,60,120,840,840,2520,2520,27720,55440,720720,720720,1081080,
%T A135060 2162160,36756720,36756720,698377680,698377680,698377680,698377680,
%U A135060 16062686640,48188059920,160626866400,160626866400,160626866400
%N A135060 a(n) = smallest number m for which none of the first n multiples of m 
               has twice as many divisors as m.
%C A135060 a(n) is smallest value m where A129902(m)/m > n.
%C A135060 Conjecture: every number in this sequence is also in A002182. - Lowell 
               Disproved at a(24) = 48188059920 - Chandler.
%C A135060 Comment from J. Lowell (jhbubby(AT)mindspring.com), Jun 06 2008: The 
               conjecture that every term is a multiple of the preceding term is 
               disproved at n = 15; a(15) = 1081080, which is not a multiple of 
               720720.
%H A135060 Ray Chandler, <a href="b135060.txt">Table of n, a(n) for n=1..130</a>
%e A135060 60 does not qualify for a(6) because 60 has 12 divisors and 60*6=360 
               has 12*2=24 divisors
%Y A135060 Sequence in context: A126915 A002201 A004490 this_sequence A072486 A096123 
               A081125
%Y A135060 Adjacent sequences: A135057 A135058 A135059 this_sequence A135061 A135062 
               A135063
%K A135060 nonn
%O A135060 1,2
%A A135060 J. Lowell (jhbubby(AT)mindspring.com), Feb 11 2008, Jul 08 2008, Jul 
               14 2008
%E A135060 More terms from J. Lowell (jhbubby(AT)mindspring.com), May 13 2009
%E A135060 Corrected inequality in the comment and added a(16) - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), 
               Nov 04 2009
%E A135060 Extended by Ray Chandler (rayjchandler(AT)sbcglobal.net), Nov 10 2009

    
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Last modified December 9 18:50 EST 2009. Contains 170568 sequences.


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