%I A062950
%S A062950 1,1,0,1,0,0,0,0,0,0,5,0,2,2,6,0,3,2,5,0,0,2,7,5,3,5,9,2,8,6,7,6,15,5,
               20,3,15,6,21,
%T A062950 5,10,7,15,0,0,6,10,7,14,15,15,3,21,15,20,9,0,6,41,8,20,14,35,7,14,14,
               13,15,12,15,54,
%U A062950 20,21,20,41,15,16,14,12,21,0,15,30,10,27,21,39,15,54,13,41,0,54,14,75,
               10,41,21,42,14
%V A062950 -1,-1,0,-1,0,0,0,0,0,0,5,0,2,2,6,0,3,2,5,0,0,2,7,5,3,5,9,2,8,6,7,6,15,
               5,20,3,15,6,21,
%W A062950 5,10,7,15,0,0,6,10,7,14,15,15,3,21,15,20,9,0,6,41,8,20,14,35,7,14,14,
               13,15,12,15,54,
%X A062950 20,21,20,41,15,16,14,12,21,0,15,30,10,27,21,39,15,54,13,41,0,54,14,75,
               10,41,21,42,14
%N A062950 C(H(n)), where C(n) is Chowla's function (A048050) and H(n) is the half-totient 
               function (A023022).
%o A062950 (PARI) C(n)=sigma(n)-n-1; H(n)=eulerphi(n)/2; j=[]; for(n=3,150,j=concat(j,
               C(H(n)))); j
%Y A062950 Cf. A048050, A023022.
%Y A062950 Sequence in context: A133843 A064315 A099221 this_sequence A019625 A021999 
               A021203
%Y A062950 Adjacent sequences: A062947 A062948 A062949 this_sequence A062951 A062952 
               A062953
%K A062950 sign
%O A062950 3,11
%A A062950 Jason Earls (zevi_35711(AT)yahoo.com), Jul 21 2001