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 A155147 #14 Jun 30 2025 14:16:56 %S A155147 12,13,16,17,18,19,21,23,25,26,28,31,33,34,37,39,42,43,44,45,46,50,53, %T A155147 56,58,60,64,67,68,74,77,78,79,80,81,83,86,90,91,95,98,99,106,111,114, %U A155147 117,121,122,132,140,142,146,150,157,160,163,164,171,172,175,177,179 %N A155147 Numbers k such that k^3 has exactly 4 different digits. %H A155147 John Cerkan, <a href="/A155147/b155147.txt">Table of n, a(n) for n = 1..1006</a> %p A155147 a := proc (n) if nops(convert(convert(n^3, base, 10), set)) = 4 then n else end if end proc: seq(a(n), n = 1 .. 220); # _Emeric Deutsch_, Jan 26 2009 %Y A155147 Cf. A155146. %K A155147 nonn,base %O A155147 1,1 %A A155147 _Dmitry Kamenetsky_, Jan 21 2009 %E A155147 Extended by _Emeric Deutsch_, Jan 26 2009