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 A043369 #14 Apr 24 2021 02:05:14 %S A043369 6,12,18,24,30,37,38,39,40,41,42,48,54,60,66,73,74,75,76,77,78,84,90, %T A043369 96,102,109,110,111,112,113,114,120,126,132,138,145,146,147,148,149, %U A043369 150,156,162,168,174,181,182,183,184,185,186,192 %N A043369 Numbers having one 0 in base 6. %t A043369 Select[Range[200],DigitCount[#,6,0]==1&] (* _Harvey P. Dale_, Sep 22 2019 *) %Y A043369 Cf. A007092. %K A043369 nonn,base %O A043369 1,1 %A A043369 _Clark Kimberling_