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a(n) = floor(3n/2log(n)).
0

%I #5 Mar 09 2023 15:34:25

%S 4,4,4,4,5,5,5,6,6,6,7,7,7,8,8,9,9,9,10,10,10,11,11,11,11,12,12,12,13,

%T 13,13,14,14,14,15,15,15,15,16,16,16,17,17,17,18,18,18,18,19,19,19,20,

%U 20,20,20,21,21,21,21,22,22,22,23,23,23,23,24,24,24,24,25,25,25,26,26,26,26,27

%N a(n) = floor(3n/2log(n)).

%K nonn

%O 2,1

%A _N. J. A. Sloane_, Feb 06 2008, following a suggestion of M. F. Hasler.