A013575 - OEIS

%I #6 Jan 08 2014 22:37:58

%S 6,13,19,24,30,36,42,48,54,60,66,72,78,84,90

%N Minimal scope of an (n,3) 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,more

%O 1,1

%A _N. J. A. Sloane_.