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 A048368 #18 Feb 16 2025 08:32:40 %S A048368 17,7,179,477,707,6935,15477,44197,535677,693368,2028209,7566137, %T A048368 32215777,62446477,322024127,2027400657,5171307877,15373346477, %U A048368 28575396477,237304541491,322033146477,5105022776547,4536383124177 %N A048368 a(n)^3 is smallest cube containing exactly n 3's. %H A048368 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/CubicNumber.html">Cubic Number</a> %e A048368 477^3 = 108531333 is the first cube containing four 3's, so a(4) = 477. %t A048368 nsmall = Table[Infinity, 15]; %t A048368 For[i = 0, i <= 10^6, i++, n0 = Count[IntegerDigits[i^3], 3]; %t A048368 If[nsmall[[n0]] > i, nsmall[[n0]] = i]]; %t A048368 Cases[nsmall, _?NumberQ] (* _Robert Price_, Mar 20 2020 *) %Y A048368 Cf. A036530, A048365, A048366, A048367, A048369, A048370, A048371, A048372, A048373, A048374. %K A048368 nonn,base,more %O A048368 1,1 %A A048368 _Patrick De Geest_, Mar 15 1999 %E A048368 a(14)-a(16) from Simon Nickerson (simonn(AT)maths.bham.ac.uk), Aug 12 2005 %E A048368 a(17)-a(20) from _Lars Blomberg_, Jun 12 2011 %E A048368 a(21)-a(23) from _Giovanni Resta_, Jun 29 2018