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A004228 a(n) = 10000*log_10(n) rounded down. 3

%I #15 Oct 25 2023 07:41:41

%S 0,3010,4771,6020,6989,7781,8450,9030,9542,10000,10413,10791,11139,

%T 11461,11760,12041,12304,12552,12787,13010,13222,13424,13617,13802,

%U 13979,14149,14313,14471,14623

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

%t Floor[10^4 Log[10,Range[30]]] (* _Harvey P. Dale_, Feb 07 2015 *)

%Y Cf. A004229, A004230.

%Y Cf. A004216, A004219, A004222, A004225.

%K nonn

%O 1,2

%A _N. J. A. Sloane_

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Last modified July 23 04:43 EDT 2024. Contains 374544 sequences. (Running on oeis4.)