Search: id:A116486
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%I A116486
%S A116486 8,24,80,125,224,2400,3024,4224,4374,6655,9800,10647,123200,194480,
%T A116486 336140,601425,633555,709631,5142500,5909760,11859210,1611308699
%N A116486 Numbers n such that both n and n+1 are logarithmically smooth.
%C A116486 N is logarithmically smooth if its largest prime factor is not more than 
               ceiling(log2(n)).
%C A116486 Is the sequence finite?
%H A116486 <a href="http://www.mersenneforum.org/showthread.php?t=5630">More information</
               a>
%e A116486 125 is there because 125=5*5*5, 126=2*3*3*7; no prime factor is greater 
               than ceiling(log2(125))=7.
%Y A116486 Sequence in context: A005051 A083583 A078158 this_sequence A141317 A146534 
               A097544
%Y A116486 Adjacent sequences: A116483 A116484 A116485 this_sequence A116487 A116488 
               A116489
%K A116486 nonn
%O A116486 1,1
%A A116486 Harsh R. Aggarwal (harsh251(AT)yahoo.com), Mar 20 2006
%E A116486 Edited by Don Reble (djr(AT)nk.ca), Apr 07 2006

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