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 A031897 #7 Nov 16 2019 03:28:44 %S A031897 801,819,855,975,1323,1455,1533,1659,1893,1959,2187,2271,2379,3213, %T A031897 3339,3969,4095,4251,4377,4413,4509,4587,4713,4833,4881,5103,5487, %U A031897 5613,5883,5991,6093,6345,6399,6951,6999,7101,7167,7293,7419,7827 %N A031897 Lucky numbers with size of gaps equal to 14 (upper terms). %H A031897 Amiram Eldar, <a href="/A031897/b031897.txt">Table of n, a(n) for n = 1..10000</a> %Y A031897 Cf. A000959, A031896. %K A031897 nonn %O A031897 1,1 %A A031897 _Patrick De Geest_