%I A083923
%S A083923 0,1,0,1,0,0,0,1,1,0,0,0,0,0,0,0,0,1,1,0,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,
%T A083923 0,0,0,0,0,0,0,0,0,0,1,1,0,1,1,1,0,0,0,1,1,0,1,1,1,0,1,1,1,1,0,0,0,0,0,
%U A083923 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
%N A083923 Characteristic function for A057548.
%H A083923 <a href="Sindx_Ch.html#char_fns">Index entries for characteristic functions</
               a>
%F A083923 a(n) = 1 if A057515(n)=1 (equivalently: if A072772(n)=0), otherwise 0.
%Y A083923 a(n) = A083924(A069770(n)). Used to compute A083925.
%Y A083923 Sequence in context: A116865 A157687 A127266 this_sequence A101309 A141474 
               A073424
%Y A083923 Adjacent sequences: A083920 A083921 A083922 this_sequence A083924 A083925 
               A083926
%K A083923 nonn
%O A083923 0,1
%A A083923 Antti Karttunen (MyFirstname.MySurname(AT)iki.fi) May 13 2003