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 A031892 #8 Nov 16 2019 03:28:59 %S A031892 141,273,339,399,519,591,621,831,873,885,981,1011,1029,1107,1209,1251, %T A031892 1329,1533,1587,1809,1869,1923,2085,2163,2301,2355,2625,2715,2763, %U A031892 2787,2877,2913,2943,2961,3039,3099,3111,3123,3153,3213,3675 %N A031892 Lucky numbers with size of gaps equal to 10 (lower terms). %H A031892 Amiram Eldar, <a href="/A031892/b031892.txt">Table of n, a(n) for n = 1..10000</a> %Y A031892 Cf. A000959, A031893. %K A031892 nonn %O A031892 1,1 %A A031892 _Patrick De Geest_