Search: id:A161175
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%I A161175
%S A161175 1,1,2,1,2,2,1,1,2,2,1,2,1,1,2,1,2,2,1,2,1,1,2,2,1,1,2,1,2,2,1,1,2,2,1,
%T A161175 2,1,1,2,2,1,1,2,1,2,2,1,2,1,1,2,1,2,2,1,1,2,2,1,2,1,1,2
%N A161175 Triangle by rows, modified Thue-Morse sequence, (A010060 with offset 
               1): change 0 to 2, else 1.
%C A161175 Row sums = A003945: (1, 3, 6, 12, 24,...). Rows tend to A001285: (1, 
               2, 2, 1, 2, 1, 1, 2, 2, 1, 1, 2,...).
%F A161175 Given A010060 starting with offset 1, change zeros to 2, retain 1's. 
               By rows, (n+1)-th row = n-th row with n-th row appended under morphism 
               1->2, 2->1.
%e A161175 First few rows of the triangle =
%e A161175 1;
%e A161175 1, 2;
%e A161175 1, 2, 2, 1;
%e A161175 1, 2, 2, 1, 2, 1, 1, 2;
%e A161175 1, 2, 2, 1, 2, 1, 1, 2, 1, 1, 2, 1, 2, 2, 1;
%e A161175 ...
%e A161175 Given A010060 starting with 1 (below, top row); 0->2, else 1:
%e A161175 A010060: (1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1,...)
%e A161175 A161175: (1, 1, 2, 1, 2, 2, 1, 1, 2, 2, 1,...)
%e A161175 Triangle by rows, row 4 = (1, 2, 2, 1, 2, 1, 1, 2) = (2, 1, 1, 2) appended 
               to the right of (1, 2, 2, 1).
%Y A161175 Cf. A010060, A001285, A003945
%Y A161175 Sequence in context: A144083 A054350 A026606 this_sequence A095955 A078573 
               A143786
%Y A161175 Adjacent sequences: A161172 A161173 A161174 this_sequence A161176 A161177 
               A161178
%K A161175 nonn,tabl
%O A161175 1,3
%A A161175 Gary W. Adamson (qntmpkt(AT)yahoo.com), Jun 05 2009

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