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 A032589 #10 Oct 06 2019 18:23:34 %S A032589 9,49,69,79,99,129,159,169,189,219,259,289,319,339,349,399,409,429, %T A032589 489,519,529,559,579,619,639,679,699,729,739,769,819,979,1009,1029, %U A032589 1039,1179,1189,1209,1219,1249,1309,1329,1339,1369,1389,1419,1459 %N A032589 Lucky numbers (A000959) ending with digit 9. %C A032589 Because lucky numbers are all odd, these are also the lucky numbers that are congruent to 4 mod 5. - Nathaniel Johnston, Jun 24 2011 %H A032589 Nathaniel Johnston, <a href="/A032589/b032589.txt">Table of n, a(n) for n = 1..10000</a> %Y A032589 Cf. A000959. %K A032589 nonn,base,easy %O A032589 1,1 %A A032589 _Patrick De Geest_, Apr 15 1998