%I #4 Mar 30 2012 18:56:05
%S 1,1,1,1,2,3,2,3,3,4,3,4,5,4,6,4,6,5,7,8,6,8,6,9,10,7,10,8,11,8,11,12,
%T 9,13,10,13,10,14,15,11,15,11,16,12,16,17,13,18,13,18,19,14,20,15,20,
%U 15,21,22,16,22,16,23,17,23,24,18,25,18,25,19
%N a(n) = |s(n) - n|, where s = A026255.
%K nonn
%O 1,5
%A _Clark Kimberling_