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%I #7 Mar 30 2012 18:50:25
%S 0,2,4,6,8,11,11,14,16,21,21,25,21,25,25,30,32,41,41,47,41,47,47,53,
%T 41,47,47,53,47,53,53,62,64,81,81,91,81,91,91,99,81,91,91,99,91,99,99,
%U 109,81,91,91,99,91,99,99,109,91,99,99,109,99,109,109,126,128,161,161,179
%N Sum of the largest and smallest number having in binary representation the same number of 0's and 1's as n.
%C a(n) = A073137(n) + A073138(n).
%H <a href="/index/Bi#binary">Index entries for sequences related to binary expansion of n</a>
%Y Cf. A007088, A073139, A073141.
%K nonn
%O 0,2
%A _Reinhard Zumkeller_, Jul 16 2002