%I A053650
%S A053650 0,2,3,8,5,24,7,32,27,60,11,96,13,112,105,128,17,216,19,240,189,264,23,
%T A053650 384,125,364,243,448,29,660,31,512,429,612,385,864,37,760,585,960,41,
%U A053650 1260,43,1056,945,1104,47,1536,343,1500,969,1456,53,1944,825,1792,1197
%N A053650 Cototient function of n^2.
%C A053650 Seems to be invertible like n*Phi(n). Compare with A002618, A038040.
%F A053650 a(n)= n*(n-EulerPhi(n))=n^2-n*Phi(n)=Cototient(n^2)=A051953(A000290(n)).
%e A053650 For n = prime p, Cototient(p)=1 and a(p)=p
%Y A053650 A002618(n) + a(n) = n^2
%Y A053650 Cf. A000005, A038040.
%Y A053650 Cf. A001248, A002618, A053650, A053192, A053193, A036689.
%Y A053650 Sequence in context: A075384 A072500 A062956 this_sequence A119794 A117987 
               A091136
%Y A053650 Adjacent sequences: A053647 A053648 A053649 this_sequence A053651 A053652 
               A053653
%K A053650 nonn
%O A053650 1,2
%A A053650 Labos E. (labos(AT)ana.sote.hu), Feb 18 2000