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 A095042 #7 Dec 24 2019 08:25:53 %S A095042 1,2,4,5,7,8,9,10,14,16,18,19,20,25,28 %N A095042 One of two (v,k,lambda)=(31,15,7) cyclic difference sets. The other one is A095041. %C A095042 See A095029. %H A095042 Dan Gordon, <a href="http://web.archive.org/web/20101226230341/http://www.ccrwest.org/diffsets/ds_list.pdf">List of Cyclic Difference Sets</a>, (2003). %H A095042 Dan Gordon, <a href="https://dmgordon.org/diffset">Difference Sets</a>, searchable database. %Y A095042 Cf. A095025 (number of cyclic difference sets with n elements), A095029-A095047 (more examples of cyclic difference sets with k=5..20). %K A095042 fini,full,nonn %O A095042 1,2 %A A095042 _Hugo Pfoertner_, May 27 2004