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 A115249 #4 Jul 11 2023 08:07:39 %S A115249 19,46,53,82,100,104,109,127,128,154,172,217,228,251,257,262,271,278, %T A115249 289,303,316,352,353,359,379,397,415,428,447,451,460,478,487,505,514, %U A115249 545,586,594,603,620,640,649,667,676,692,694,721,728,739,753,757,767 %N A115249 Values in A115248 that are not in A005123. %Y A115249 Cf. A005123, A115248. %K A115249 nonn %O A115249 0,1 %A A115249 _Christian G. Bower_, Jan 17 2006