This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A295302 #10 Mar 27 2019 13:50:48
%S A295302 0,-1,0,-1,2,-3,5,-1,3,-3,7,-5,15,-2,0,-1,14,-6,20,-5,7,-4,13,-9,17,2,
%T A295302 12,0,27,-15,41,-1,9,-3,25,-8,54,1,21,-9,49,-14,53,-2,15,-10,25,-17,
%U A295302 47,-8,12,8,45,-15,35,4,34,-2,31,-29,107,10,28,-1,59,-24,77,-5,15,-10,73,-12,122,17,15,15,91,-18,89,-17,39,8
%N A295302 a(n) = sigma(phi(n)) - n, where phi = A000010 and sigma = A000203.
%H A295302 Antti Karttunen, <a href="/A295302/b295302.txt">Table of n, a(n) for n = 1..65537</a>
%F A295302 a(n) = A062402(n) - n.
%t A295302 Table[DivisorSigma[1,EulerPhi[n]]-n,{n,90}] (* _Harvey P. Dale_, Mar 27 2019 *)
%o A295302 (PARI) A295302(n) = (sigma(eulerphi(n)) - n);
%Y A295302 Cf. A000010, A000203, A062402, A295301, A295304.
%Y A295302 Cf. A018784 (positions of zeros), A230201 (of negative terms), A230203 (of positive terms).
%K A295302 sign
%O A295302 1,5
%A A295302 _Antti Karttunen_, Nov 21 2017