This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A013576 #8 Jul 08 2025 02:47:58 %S A013576 11,22,32,41,51,60,71,80,91,100,111,120,131,140,151 %N A013576 Minimal scope of an (n,4) difference triangle. %D A013576 CRC Handbook of Combinatorial Designs, 1996, p. 315. %H A013576 J. B. Shearer, <a href="http://www.research.ibm.com/people/s/shearer/dtsopt.html">Difference Triangle Sets: Known optimal solutions</a>. %H A013576 J. B. Shearer, <a href="http://www.research.ibm.com/people/s/shearer/dtslb.html">Difference Triangle Sets: Discoverers</a> %K A013576 nonn,hard %O A013576 1,1 %A A013576 _N. J. A. Sloane_