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%I #17 Mar 20 2020 22:30:41
%S 17,7,179,477,707,6935,15477,44197,535677,693368,2028209,7566137,
%T 32215777,62446477,322024127,2027400657,5171307877,15373346477,
%U 28575396477,237304541491,322033146477,5105022776547,4536383124177
%N a(n)^3 is smallest cube containing exactly n 3's.
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/CubicNumber.html">Cubic Number</a>
%e 477^3 = 108531333 is the first cube containing four 3's, so a(4) = 477.
%t nsmall = Table[Infinity, 15];
%t For[i = 0, i <= 10^6, i++, n0 = Count[IntegerDigits[i^3], 3];
%t If[nsmall[[n0]] > i, nsmall[[n0]] = i]];
%t Cases[nsmall, _?NumberQ] (* _Robert Price_, Mar 20 2020 *)
%Y Cf. A036530, A048365, A048366, A048367, A048369, A048370, A048371, A048372, A048373, A048374.
%K nonn,base,more
%O 1,1
%A _Patrick De Geest_, Mar 15 1999
%E a(14)-a(16) from Simon Nickerson (simonn(AT)maths.bham.ac.uk), Aug 12 2005
%E a(17)-a(20) from _Lars Blomberg_, Jun 12 2011
%E a(21)-a(23) from _Giovanni Resta_, Jun 29 2018