Search: id:A140079
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%I A140079
%S A140079 254540,310155,378014,421134,432795,483405,486590,486794,488565,489345,
%T A140079 507129,522444,545258,549185,558789,558830,567644,577940,584154,591260,
%U A140079 598689,627095,634809,637329,663585,666995,667029,678755,687939,690234
%N A140079 Numbers n such that n and n+1 have 5 distinct prime factors.
%C A140079 Smallest number r such that r and r+1 have n distinct prime factors see 
               A093548
%H A140079 D. A. Goldston, S. W. Graham, J. Pintz, C. Y. Yildirim., <a href="http:/
               /front.math.ucdavis.edu/0803.2636">Small gaps between almost primes, 
               the parity problem and some conjectures of Erdos on consecutive integers</
               a>.
%t A140079 a = {}; Do[If[Length[FactorInteger[n]] == 5 && Length[FactorInteger[n 
               + 1]] == 5, AppendTo[a, n]], {n, 1, 100000}]; a (*Artur Jasinski*)
%Y A140079 Cf. A074851, A140077, A140078.
%Y A140079 Sequence in context: A083628 A140967 A069176 this_sequence A034631 A147579 
               A087025
%Y A140079 Adjacent sequences: A140076 A140077 A140078 this_sequence A140080 A140081 
               A140082
%K A140079 nonn
%O A140079 1,1
%A A140079 Artur Jasinski (grafix(AT)csl.pl), May 07 2008

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