%I #4 Mar 30 2012 18:56:06
%S 1,1,2,3,2,4,3,5,6,4,7,8,5,6,9,10,7,11,8,12,13,14,9,15,10,16,17,11,18,
%T 19,12,13,20,14,21,22,15,23,24,16,17,25,26,18,27,19,28,29,30,20,31,32,
%U 21,33,22,34,35,23,24,36,37,38,39,25,26,40
%N a(n) = a(m) if a(m) has already occurred exactly once and n = m+[ m/2 ]+1, else a(n) = least positive integer that has not yet occurred.
%K nonn
%O 1,3
%A _Clark Kimberling_
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