%I #4 Mar 30 2012 18:56:05
%S 1,2,3,4,6,8,10,12,13,15,16,18,19,21,22,24,26,27,29,31,32,34,36,37,39,
%T 41,42,44,45,47,49,50,52,53,55,57,58,60,61,63,65,66,68,69,71,73,74,76,
%U 78,79,81,82,84,86,87,89,91,92,94,95,97,99
%N a(n) = least k such that s(k) = n, where s = A026280.
%K nonn
%O 1,2
%A _Clark Kimberling_
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