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%I #2 Mar 30 2012 18:52:03
%S 0,1,3,1,2,3,5,7,9,4,5,6,11,13,15,7,8,9,17,19,21,10,11,12,23,25,27,13,
%T 14,15,29,31,33
%N Antidiagonal writing from three rows trio A165351,A165355,A165367 (first,second and third trisections of A026741).
%C (6n+3)-th term is 6n+3=A016945. 6n-th term is 3n=3*n=A008585.
%F Mix (A004273(3n),A004273(3n+1),A004273(3n+2)), (A000027(3n),A000027(3n+1),A000027(3n+2)).
%K nonn,uned
%O 1,3
%A _Paul Curtz_, Sep 21 2009
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