%I A081606
%S A081606 1,3,4,5,7,9,10,11,12,13,14,15,16,17,19,21,22,23,25,27,28,29,30,31,32,
%T A081606 33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,55,57,
%U A081606 58,59,61,63,64,65,66,67,68,69,70,71,73,75,76,77,79,81,82,83,84,85,86
%N A081606 Numbers having at least one 1 in their ternary representation.
%C A081606 Complement of A005823.
%C A081606 n such that central Delannoy number A001850(n) == 0 (mod 3). - Emeric 
               Deutsch and Bruce Sagan, Dec 04 2003
%Y A081606 Cf. A007089, A062756, A081609, A081605, A074940.
%Y A081606 Sequence in context: A112882 A162610 A155935 this_sequence A079945 A039017 
               A153329
%Y A081606 Adjacent sequences: A081603 A081604 A081605 this_sequence A081607 A081608 
               A081609
%K A081606 nonn,base
%O A081606 1,2
%A A081606 Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Mar 23 2003
%E A081606 More terms from Emeric Deutsch and Bruce Sagan, Dec 04 2003