Search: id:A074465
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%I A074465
%S A074465 1,1,1,1,1,1,1,1,1,1,1,1,1,7,1,1,1,1,1,1,3,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
%T A074465 1,1,1,39,1,1,21,1,1,1,1,1,1,1,1,1,1,1,1,1,1,3,1,1,1,1,1,3,1,1,1,1,1,1,
%U A074465 7,1,1,1,1,1,1,7,39,1,1,1,1,1,3,1,1,1,1,1,1,1,1,3,1,1,1,1,7,11,1,1,1,1
%N A074465 a(n)=GCD[n^2, sigma(n^2),phi(n^2)].
%F A074465 a(n)=A74389[n^2]
%e A074465 a(n) is odd because sigma[n^2] is odd; n=14:GCD[196,399,84]=7=a(14)
%t A074465 Table[Apply[GCD, {w^2, DivisorSigma[1, w^2], EulerPhi[w^2]}], {w, 1, 
               128}]
%Y A074465 Cf. A000005, A000010, A074389.
%Y A074465 Sequence in context: A053878 A070672 A055061 this_sequence A081229 A109010 
               A117825
%Y A074465 Adjacent sequences: A074462 A074463 A074464 this_sequence A074466 A074467 
               A074468
%K A074465 nonn
%O A074465 1,14
%A A074465 Labos E. (labos(AT)ana.sote.hu), Aug 23 2002

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