This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A048374 #17 Feb 16 2025 08:32:40 %S A048374 9,31,99,998,999,7937,9999,99998,99999,996999,999999,6688699,9999999, %T A048374 97609999,99969999,999999998,999899999,9998999999,9999999999, %U A048374 9999699999,99999989999,99998999999,997999998999 %N A048374 a(n)^3 is smallest cube containing exactly n 9's. %C A048374 a(24) > 5*10^12, a(25) = 999996999999. - _Giovanni Resta_, Jun 29 2018 %H A048374 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/CubicNumber.html">Cubic Number</a> %t A048374 (* A048374 *) %t A048374 nsmall = Table[Infinity, 11]; %t A048374 For[i = 0, i <= 10^6, i++, n0 = Count[IntegerDigits[i^3], 9]; %t A048374 If[nsmall[[n0]] > i, nsmall[[ n0]] = i]]; %t A048374 nsmall(* _Robert Price_, Sep 26 2018 *) %Y A048374 Cf. A036536, A048365, A048366, A048367, A048368, A048369, A048370, A048371, A048372, A048373. %K A048374 nonn,base,more %O A048374 1,1 %A A048374 _Patrick De Geest_, Mar 15 1999 %E A048374 a(16)-a(22) from _Lars Blomberg_, Jun 12 2011 %E A048374 a(23) from _Giovanni Resta_, Jun 29 2018