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%I #9 Jul 22 2019 16:38:03
%S 0,7,11,14,17,18,20,21,22,24,24,25,26,27,28,28,29,29,30,30,31,31,32,
%T 32,33,33,33,34,34,35,35,35,35,36,36,36,37,37,37,37,38,38,38,38,39,39,
%U 39,39,39,40,40,40,40,40,41
%N a(n) = ceiling(10*log(n)).
%t Ceiling[10*Log[Range[60]]] (* _Harvey P. Dale_, Jul 22 2019 *)
%K nonn
%O 1,2
%A _N. J. A. Sloane_
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