Search: id:A135060 Results 1-1 of 1 results found. %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, Table of n, a(n) for n=1..130 %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,new %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 Search completed in 0.001 seconds