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 A032690 #8 Jul 28 2021 04:24:28 %S A032690 7,13,24,33,34,39,40,42,54,64,78,97,99,103,105,108,112,123,126,127, %T A032690 129,132,133,139,142,147,150,163,172,177,205,217,219,223,229,237,240, %U A032690 255,256,258,259,265,268,270,273,274,277,282,286,292,309,312,313,316 %N A032690 Numbers k such that k surrounded by digit '9' is a lucky number. %Y A032690 Cf. A000959, A032685. %K A032690 nonn,base %O A032690 1,1 %A A032690 _Patrick De Geest_, May 15 1998