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A011999 (2n+1,3,9) difference families over Z_{2n+1}. 0

%I

%S 1,12,108,2593,225900

%N (2n+1,3,9) difference families over Z_{2n+1}.

%D CRC Handbook of Combinatorial Designs, 1996, p. 285.

%K nonn,hard

%O 2,2

%A _N. J. A. Sloane_.

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Last modified January 26 23:54 EST 2022. Contains 350601 sequences. (Running on oeis4.)