Search: id:A070299
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%I A070299
%S A070299 19,23,26,31,34,38,40,41,49,52,53,55,61,63,68,69,73,74,75,76,80,82,83,
%T A070299 85,91,96,101,103,104,106,110,112,113,117,122,123,126,130,131,133,136,
%U A070299 145,146,147,148,149,151,152,155,156,157,158,160,161,162,163,164,166
%N A070299 Numbers n such that the equation sigma(n+x)=sigma(n-x) for x=1,2,3,4,
               ..,n-1 has solution.
%o A070299 (PARI) for(n=1,200,if(0<sum(i=1,n-1,if(sigma(n+i)-sigma(n-i),0,1)),print1(n,
               ",")))
%Y A070299 Sequence in context: A050955 A072305 A095222 this_sequence A159021 A100460 
               A166061
%Y A070299 Adjacent sequences: A070296 A070297 A070298 this_sequence A070300 A070301 
               A070302
%K A070299 easy,nonn
%O A070299 1,1
%A A070299 Benoit Cloitre (benoit7848c(AT)orange.fr), May 10 2002

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