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 A031890 #8 Nov 15 2019 06:28:48 %S A031890 79,151,211,223,289,331,349,583,631,685,769,823,1147,1189,1357,1567, %T A031890 1693,1723,1801,1819,1933,1987,2023,2335,2395,2419,2563,2599,2653, %U A031890 2689,2755,2773,2827,2905,2953,3163,3175,3235,3289,3355,3499,3571 %N A031890 Lucky numbers with size of gaps equal to 8 (lower terms). %H A031890 Amiram Eldar, <a href="/A031890/b031890.txt">Table of n, a(n) for n = 1..10000</a> %Y A031890 Cf. A000959. %K A031890 nonn %O A031890 1,1 %A A031890 _Patrick De Geest_