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%I #10 Jan 08 2014 22:42:45
%S 6,19,36,60
%N Minimal scope of a (6,n) difference triangle.
%D CRC Handbook of Combinatorial Designs, 1996, p. 315.
%H J. B. Shearer, <a href="http://www.research.ibm.com/people/s/shearer/dtsopt.html">Difference Triangle Sets: Known optimal solutions</a>.
%H J. B. Shearer, <a href="http://www.research.ibm.com/people/s/shearer/dtslb.html">Difference Triangle Sets: Discoverers</a>
%Y A row or column of array in A234943.
%K nonn,hard,more
%O 1,1
%A _N. J. A. Sloane_.
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