%I A145649
%S A145649 1,0,1,0,0,0,1,0,1,0,0,0,1,0,1,0,0,0,0,0,1,0,0,0,1,0,0,0,0,0,1,0,1,0,0,
%T A145649 0,1,0,0,0,0,0,1,0,0,0,0,0,1,0,1,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,1,0,1,0,
%U A145649 0,0,1,0,1,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,1,0,0,0,0,0,1,0,0,0,0,0,1
%N A145649 Characteristic function of the lucky numbers.
%C A145649 a(A000959(n)) = 1; a(A050505(n)) = 0.
%H A145649 <a href="Sindx_Ch.html#char_fns">Index entries for characteristic functions</
               a>
%H A145649 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               LuckyNumbers.html">Lucky Numbers</a>
%Y A145649 Sequence in context: A015605 A015437 A015101 this_sequence A016340 A014021 
               A015725
%Y A145649 Adjacent sequences: A145646 A145647 A145648 this_sequence A145650 A145651 
               A145652
%K A145649 nonn
%O A145649 1,1
%A A145649 Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Oct 15 2008