Search: id:A060308
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%I A060308
%S A060308 2,3,5,7,7,11,13,13,17,19,19,23,23,23,29,31,31,31,37,37,41,43,43,47,47,
%T A060308 47,53,53,53,59,61,61,61,67,67,71,73,73,73,79,79,83,83,83,89,89,89,89,
%U A060308 97,97,101,103,103,107,109,109,113,113,113,113,113,113,113,127,127,131
%N A060308 Largest prime <= 2n.
%C A060308 a(n) is the smallest k such that C(2n,n) divides k!. - Benoit Cloitre 
               (benoit7848c(AT)orange.fr), May 30 2002
%C A060308 a(n) is largest prime factor of C(2n,n) = (2n)!/(n!)^2. - Alexander Adamchuk 
               (alex(AT)kolmogorov.com), Jul 11 2006
%F A060308 a(n) = Max[FactorInteger[(2n)!/(n!)^2]]. - Alexander Adamchuk (alex(AT)kolmogorov.com), 
               Jul 11 2006
%e A060308 n=1,2n=2,p(1)=2=a(1) is the largest prime not exceeding 2
%p A060308 with(numtheory): [seq(prevprime(2*i),i=2..256)];
%t A060308 Table[Max[FactorInteger[(2n)!/(n!)^2]],{n,1,100}] - Alexander Adamchuk 
               (alex(AT)kolmogorov.com), Jul 11 2006
%Y A060308 Cf. A020482, A049653, A060266-A060268, A060264. Apart from initial term, 
               same as A060265.
%Y A060308 Sequence in context: A156900 A039734 A020482 this_sequence A064142 A067792 
               A119317
%Y A060308 Adjacent sequences: A060305 A060306 A060307 this_sequence A060309 A060310 
               A060311
%K A060308 nonn
%O A060308 1,1
%A A060308 Labos E. (labos(AT)ana.sote.hu), Mar 27 2001
%E A060308 More terms from Alexander Adamchuk (alex(AT)kolmogorov.com), Jul 11 2006

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