%I #10 Aug 18 2021 21:45:59

%S 0,1,19,28,96,118,151,153,176,202,240,254,290,296,300,307,337,361,366,

%T 369

%N An example of a (v,k,lambda)=(381,20,1) 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), A000961 (prime powers).

%K fini,full,nonn

%O 1,3

%A _Hugo Pfoertner_, May 27 2004