Search: id:A067465
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%I A067465
%S A067465 0,13,64,67,189,344,900,2499,3028,4253,5257,6277,9075,11516,12544,18739,
%T A067465 18925,47018,49011,62355,72981,112061,125011,125653,152765,167820,
%U A067465 168317,174724,179040,225492,240597,251568,261163,302128,302812,345283
%N A067465 Numbers n such that sigma(n^2+1) is a perfect square.
%o A067465 (PARI) for(n=0,500000,if(issquare(sigma(n^2+1)),print1(n,",")))
%Y A067465 Sequence in context: A031074 A051878 A092653 this_sequence A166605 A054477 
               A010820
%Y A067465 Adjacent sequences: A067462 A067463 A067464 this_sequence A067466 A067467 
               A067468
%K A067465 easy,nonn
%O A067465 1,2
%A A067465 Benoit Cloitre (benoit7848c(AT)orange.fr), Feb 23 2002
%E A067465 More terms from Rick L. Shepherd (rshepherd2(AT)hotmail.com), Apr 16 
               2002

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