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 A033018 #19 Aug 14 2021 02:15:59 %S A033018 6,12,18,24,31,62,93,124,150,156,162,168,174,300,306,312,318,324,450, %T A033018 456,462,468,474,600,606,612,618,624,750,775,781,787,793,799,812,843, %U A033018 874,1500,1531,1550,1556,1562,1568,1574,1593 %N A033018 Numbers whose base-5 expansion has no run of digits with length < 2. %H A033018 Vincenzo Librandi, <a href="/A033018/b033018.txt">Table of n, a(n) for n = 1..1400</a> %t A033018 Select[Range[10000],Min[Length/@Split[IntegerDigits[#, 5]]]>1&] (* _Vincenzo Librandi_, Feb 05 2014 *) %Y A033018 Cf. A007091. Supersequence of A033003. %K A033018 nonn,base %O A033018 1,1 %A A033018 _Clark Kimberling_