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 A125293 #8 Feb 16 2025 08:33:04 %S A125293 5,7,11,14,15,16,17,19,21,22,23,25,29,32,33,34,35,38,41,42,43,44,45, %T A125293 46,47,48,49,50,51,52,53,55,57,58,59,61,63,64,65,66,67,68,69,70,71,73, %U A125293 75,76,77,79,83,86,87,88,89,92,95,96,97,98,99,100,101,102,103,104,105,106 %N A125293 Numbers with at least one 1 and one 2 in ternary representation. %C A125293 Complement of A125292; A062756(a(n))*A081603(a(n)) > 0; %C A125293 A125291(a(n)) > 1. %H A125293 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/Ternary.html">Ternary</a> %H A125293 <a href="/index/Ar#3-automatic">Index entries for 3-automatic sequences</a>. %t A125293 Select[Range[120],DigitCount[#,3,1]>0&&DigitCount[#,3,2]>0&] (* _Harvey P. Dale_, Apr 12 2013 *) %Y A125293 Cf. A007089, A125290. %K A125293 nonn,base,easy %O A125293 1,1 %A A125293 _Reinhard Zumkeller_, Nov 26 2006