%I #4 Mar 30 2012 16:45:41
%S 1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,
%T 0,0,0,0,0,0,10,0,0,0,2
%N (n,5,1) difference families over Z_n.
%D CRC Handbook of Combinatorial Designs, 1996, p. 286.
%K nonn,hard
%O 21,41
%A _N. J. A. Sloane_.