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a(n) = floor(100*log(n)).
1

%I #12 Aug 04 2019 01:39:00

%S 0,69,109,138,160,179,194,207,219,230,239,248,256,263,270,277,283,289,

%T 294,299,304,309,313,317,321,325,329,333,336,340,343,346,349,352,355,

%U 358,361,363,366,368,371,373,376

%N a(n) = floor(100*log(n)).

%H Robert Israel, <a href="/A004237/b004237.txt">Table of n, a(n) for n = 1..10000</a>

%p seq(floor(100*log(n)),n=1..100); # _Robert Israel_, Aug 04 2019

%Y Cf. A000195, A004234.

%K nonn

%O 1,2

%A _N. J. A. Sloane_