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 A031899 #7 Nov 16 2019 03:28:41 %S A031899 511,1417,1435,1519,1765,1915,2395,2461,3091,3259,3427,3595,3811,3865, %T A031899 3931,4285,4645,4741,5449,6211,6463,7231,7435,7549,8191,8347,8977, %U A031899 9331,10111,10255,10459,10525,10651,10747,11113,11599,11659 %N A031899 Lucky numbers with size of gaps equal to 16 (upper terms). %H A031899 Amiram Eldar, <a href="/A031899/b031899.txt">Table of n, a(n) for n = 1..10000</a> %Y A031899 Cf. A000959, A031898. %K A031899 nonn %O A031899 1,1 %A A031899 _Patrick De Geest_