%I #4 Mar 30 2012 18:56:05
%S 1,2,4,5,3,6,11,12,7,8,9,17,18,10,19,24,13,25,14,15,16,30,31,32,37,20,
%T 38,21,22,23,43,44,45,26,49,50,27,51,28,29,56,57,58,33,62,63,34,64,35,
%U 36,69,70,71,39,40,75,76,41,77,42,82,83,84
%N a(n) = (1/2)*(s(n) + 1), where s(n) is the n-th odd number in A026255.
%K nonn
%O 1,2
%A _Clark Kimberling_