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%I #4 Mar 30 2012 18:56:06
%S 1,2,3,1,4,5,2,6,7,3,8,9,10,11,4,12,13,5,14,15,16,17,6,18,19,7,20,21,
%T 22,23,8,24,25,9,26,27,10,28,29,11,30,31,32,33,12,34,35,13,36,37,38,
%U 39,14,40,41,15,42,43,16,44,45,17,46,47,48,49
%N a(n) = a(m) if a(m) has already occurred exactly once and n = a(m)+2m+1, else a(n) = least positive integer that has not yet occurred.
%K nonn
%O 1,2
%A _Clark Kimberling_
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