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 A064528 #4 Jul 16 2023 19:58:19 %S A064528 2,3,6,7,8,10,12,14,15,17,18,19,20,21,22,23,24,28,29,30,31,32,33,34, %T A064528 35,37,38,39,40,43,44,45,46,48,50,52,53,54,55,56,57,58,59,60,62,63,65, %U A064528 66,67,68,69,70,71,72,73,75,76,79,80,82,84,86,87,88,89,90 %N A064528 Positive numbers that do not appear in A064520. %K A064528 nonn %O A064528 1,1 %A A064528 Jonathan Ayres (jonathan.ayres(AT)btinternet.com), Oct 07 2001, Oct 07 2001 %E A064528 More terms from _Sean A. Irvine_, Jul 16 2023