%I A023533
%S A023533 1,1,0,0,1,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,
%T A023533 0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,
%U A023533 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0
%N A023533 a(n) = 1 if n of form m(m+1)(m+2)/6, otherwise 0.
%C A023533 a(A000292(n))=1; a(A145397(n))=0; a(n)=1-A014306(n). [From Reinhard Zumkeller 
               (reinhard.zumkeller(AT)gmail.com), Oct 14 2008]
%H A023533 <a href="Sindx_Ch.html#char_fns">Index entries for characteristic functions</
               a>
%Y A023533 Sequence in context: A113047 A127692 A014305 this_sequence A010052 A039985 
               A127239
%Y A023533 Adjacent sequences: A023530 A023531 A023532 this_sequence A023534 A023535 
               A023536
%K A023533 nonn
%O A023533 0,1
%A A023533 Clark Kimberling (ck6(AT)evansville.edu)