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a(n) = 10000*log_10(n) rounded up.
3

%I #13 Oct 25 2023 07:41:29

%S 0,3011,4772,6021,6990,7782,8451,9031,9543,10000,10414,10792,11140,

%T 11462,11761,12042,12305,12553,12788,13011,13223,13425,13618,13803,

%U 13980,14150,14314,14472,14624

%N a(n) = 10000*log_10(n) rounded up.

%Y Cf. A004228, A004239.

%Y Cf. A004218, A004221, A004224, A004227.

%K nonn

%O 1,2

%A _N. J. A. Sloane_