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a(n) = 10000*log_10(n) rounded to the nearest integer.
2

%I #14 Oct 25 2023 07:40:37

%S 0,3010,4771,6021,6990,7782,8451,9031,9542,10000,10414,10792,11139,

%T 11461,11761,12041,12304,12553,12788,13010,13222,13424,13617,13802,

%U 13979,14150,14314,14472,14624

%N a(n) = 10000*log_10(n) rounded to the nearest integer.

%t Round[10000*Log10[Range[30]]] (* _Harvey P. Dale_, Aug 22 2018 *)

%Y Cf. A004228, A004230.

%Y Cf. A004220, A004223, A004226.

%K nonn

%O 1,2

%A _N. J. A. Sloane_