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 A013577 #8 Jul 08 2025 02:48:03 %S A013577 17,34,49,64,79 %N A013577 Minimal scope of an (n,5) difference triangle. %D A013577 CRC Handbook of Combinatorial Designs, 1996, p. 315. (But beware errors!) %H A013577 J. B. Shearer, <a href="http://www.research.ibm.com/people/s/shearer/dtsopt.html">Difference Triangle Sets: Known optimal solutions</a>. %H A013577 J. B. Shearer, <a href="http://www.research.ibm.com/people/s/shearer/dtslb.html">Difference Triangle Sets: Discoverers</a> %K A013577 nonn,hard %O A013577 1,1 %A A013577 _N. J. A. Sloane_