%I A123466
%S A123466 2,5,10,11,12,13,18,19,20,21,22,23,25,26,29,34,37,38,40,41,42,43,44,45,
%T A123466 46,47,50
%N A123466 Write the positive integer n in binary. Subdivide the binary n into runs 
               each consisting entirely of 0s or of 1's, where the runs alternate 
               between those of 1s and those of 0s. The sequence gives those numbers 
               n such that there is at least one run of 1s of the same length as 
               at least one run of 0s.
%H A123466 Leroy Quet, <a href="http://www.prism-of-spirals.net/">Home Page</a> 
               (listed in lieu of email address)
%e A123466 25 written in binary is 11001. The runs are (11)(00)(1). Since at least 
               one run of 1's (the leftmost run here) is the same length as at least 
               one run of 0s (the only run of 0s here), 25 is included in this sequence.
%Y A123466 Sequence in context: A097378 A078310 A138848 this_sequence A144793 A140707 
               A136817
%Y A123466 Adjacent sequences: A123463 A123464 A123465 this_sequence A123467 A123468 
               A123469
%K A123466 base,more,nonn
%O A123466 1,1
%A A123466 Leroy Quet Jul 11 2008
%E A123466 a(16) to a(27) from Ray G. Opao (qzxpqbp(AT)gmail.com), Jan 08 2009