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A061435 a(n) is the largest n-digit cube. 5

%I

%S 8,64,729,9261,97336,970299,9938375,99897344,997002999,9993948264,

%T 99961946721,999700029999,9999516957184,99994258523375,

%U 999970000299999,9999934692543307,99999429057832312,999997000002999999

%N a(n) is the largest n-digit cube.

%H Harvey P. Dale, <a href="/A061435/b061435.txt">Table of n, a(n) for n = 1..1000</a>

%F a(n) = (ceiling(10^(n/3)) - 1)^3. - Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Mar 30 2003

%e a(4) = 9261 = 21^3 has 4 digits while 22^3 = 10648 has 5 digits.

%p A061435 := n->(ceil(10^(n/3))-1)^3;

%t Table[Floor[Surd[10^n-1,3]]^3,{n,20}] (* _Harvey P. Dale_, Apr 02 2020 *)

%Y Cf. A061432, A061433, A061434.

%K nonn,base,easy

%O 1,1

%A _Amarnath Murthy_, May 03 2001

%E More terms from Larry Reeves (larryr(AT)acm.org), May 16 2001

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Last modified September 16 07:19 EDT 2021. Contains 347469 sequences. (Running on oeis4.)