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Powers of fifth root of 10 rounded down.
3

%I #16 Jun 26 2024 09:33:06

%S 1,1,2,3,6,10,15,25,39,63,100,158,251,398,630,1000,1584,2511,3981,

%T 6309,10000,15848,25118,39810,63095,100000,158489,251188,398107,

%U 630957,1000000,1584893,2511886,3981071,6309573

%N Powers of fifth root of 10 rounded down.

%H Harvey P. Dale, <a href="/A018141/b018141.txt">Table of n, a(n) for n = 0..1000</a>

%t Floor[(10^(1/5))^Range[0,40]] (* _Harvey P. Dale_, Sep 24 2012 *)

%o (PARI) a(n) = sqrtnint(10^n, 5); \\ _Michel Marcus_, Jun 26 2024

%Y Cf. A018142, A018143.

%K nonn

%O 0,3

%A _N. J. A. Sloane_.