%I A120631
%S A120631 0,1,3,4,5,8,9,11,12,13,15,1,1,1,1,1,16,17,19,20,21,24,25,27,28,29,31,
               1,1,1,1,
%T A120631 1,32,33,35,36,37,40,41,43,44,45,47,1,1,1,1,1,48,49,51,52,53,56,57,59,
               60,61,63,
%U A120631 1,1,1,1,1,64,65,67,68,69,72,73,75,76,77,79,1,1,1,1,1,80,81,83,84,85,88,
               89
%V A120631 0,1,3,4,5,8,9,11,12,13,15,-1,-1,-1,-1,-1,16,17,19,20,21,24,25,27,28,29,
               31,-1,-1,-1,-1,
%W A120631 -1,32,33,35,36,37,40,41,43,44,45,47,-1,-1,-1,-1,-1,48,49,51,52,53,56,
               57,59,60,61,63,
%X A120631 -1,-1,-1,-1,-1,64,65,67,68,69,72,73,75,76,77,79,-1,-1,-1,-1,-1,80,81,
               83,84,85,88,89
%N A120631 Decimal equivalent of A066329.
%C A120631 There is some ambiguity here: Should 1 be made as 10 or 01? Should 5 
               be made as 1000 or 0111? The terms here choose 01 and 1000 respectively. 
               The original author did not give a term for 10, so I do not know 
               if 1111 should be considered a valid string (using both 5s) or not. 
               I assumed it was valid in extending the sequence.
%Y A120631 Cf. A066329 for the binary version and a fuller description of this sequence.
%Y A120631 Sequence in context: A100614 A127427 A047205 this_sequence A047601 A029675 
               A030310
%Y A120631 Adjacent sequences: A120628 A120629 A120630 this_sequence A120632 A120633 
               A120634
%K A120631 base,easy,sign
%O A120631 0,3
%A A120631 Joshua Zucker (joshua.zucker(AT)stanfordalumni.org), Jun 21 2006