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 A032688 #10 Jul 28 2021 04:27:28 %S A032688 3,23,29,32,33,38,45,51,65,75,90,96,108,110,113,116,125,132,135,147, %T A032688 167,183,185,186,195,204,216,218,227,236,242,246,248,254,255,257,263, %U A032688 275,276,278,284,293,297,300,314,315,320,323,324,326,330,338,345,347 %N A032688 Numbers k such that k surrounded by digit '5' is a lucky number. %Y A032688 Cf. A000959, A032682. %K A032688 nonn,base %O A032688 1,1 %A A032688 _Patrick De Geest_, May 15 1998