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a(n) = least k such that s(k) = n, where s = A026346.
1

%I #4 Mar 30 2012 18:56:06

%S 1,3,4,5,7,8,10,12,13,14,16,17,19,20,21,23,24,25,27,29,30,32,33,34,36,

%T 38,39,40,42,43,45,47,48,49,51,52,54,56,57,58,60,61,62,64,65,67,68,69,

%U 71,73,74,76,77,78,80,81,82,84,86,87,89,90

%N a(n) = least k such that s(k) = n, where s = A026346.

%K nonn

%O 1,2

%A _Clark Kimberling_