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%I #11 Aug 18 2021 21:45:20
%S 1,2,3,4,6,8,9,12,13,16,18
%N An example of a (v,k,lambda)=(23,11,5) cyclic difference set.
%C See A095029.
%H 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 Dan Gordon, <a href="https://dmgordon.org/diffset">Difference Sets</a>, searchable database.
%Y Cf. A095025 (number of cyclic difference sets with n elements), A095029-A095047 (more examples of cyclic difference sets with k=5..20).
%K fini,full,nonn
%O 1,2
%A _Hugo Pfoertner_, May 27 2004