Search: id:A087968
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%I A087968
%S A087968 1,1,9,1,1,1,1,1,27,25,1,1,1,1,9,1,1,1,1,1,9,1,1,1,1,1,81,1,1,25,1,1,9,
%T A087968 1,1,1,1,1,9,1,1,1,1,1,27,1,1,1,1,125,9,1,1,1,121,1,9,1,1,1,1,1,27,1,1,
%U A087968 1,1,289,9,25,1,1,1,1,9,1,1,169,1,1,243,1,1,1,1,1,9,1,1,25,1,1,9,1,1,1
%N A087968 a(n)=GCD[1+2^n,n^2].
%e A087968 n=9: GCD[513,81]=27=a(9)
%Y A087968 Sequence in context: A078297 A113061 A087966 this_sequence A110483 A010164 
               A006084
%Y A087968 Adjacent sequences: A087965 A087966 A087967 this_sequence A087969 A087970 
               A087971
%K A087968 nonn
%O A087968 1,3
%A A087968 Labos E. (labos(AT)ana.sote.hu), Sep 22 2003

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