%I A010893
%S A010893 1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,10,0,0,0,0,
%T A010893 0,0,0,0,224,0,0,206,0,0,0,0,0,0,0,0,18132,0,0,12048
%N A010893 (n,4,1) difference families over Z_n.
%D A010893 CRC Handbook of Combinatorial Designs, 1996, p. 286.
%Y A010893 Sequence in context: A134414 A113036 A000425 this_sequence A000171 A054922 
               A061848
%Y A010893 Adjacent sequences: A010890 A010891 A010892 this_sequence A010894 A010895 
               A010896
%K A010893 nonn,hard
%O A010893 13,25
%A A010893 N. J. A. Sloane (njas(AT)research.att.com).