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 A043513 #18 Apr 24 2021 21:15:15 %S A043513 6,16,26,36,46,56,60,61,62,63,64,65,67,68,69,76,86,96,106,116,126,136, %T A043513 146,156,160,161,162,163,164,165,167,168,169,176,186,196,206,216,226, %U A043513 236,246,256,260,261,262,263,264,265,267,268 %N A043513 Numbers having one 6 in base 10. %H A043513 Enrique Pérez Herrero, <a href="/A043513/b043513.txt">Table of n, a(n) for n = 1..2000</a> %H A043513 <a href="/index/Ar#10-automatic">Index entries for 10-automatic sequences</a>. %t A043513 Select[Range[300],DigitCount[#,10,6]==1&] (* _Harvey P. Dale_, Aug 15 2011 *) %Y A043513 Cf. A043489, A043493, A043497, A043501, A043505, A043509, A043517, A043521, A043525, A011536. %K A043513 nonn,base,easy %O A043513 1,1 %A A043513 _Clark Kimberling_