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 A048894 #5 Oct 04 2012 10:28:38 %S A048894 0,0,0,0,0,0,0,0,0,0,0,5,0,0,0,0,0,2,0,8,0,0,0 %N A048894 n - 1 - A048893(n). %H A048894 E. M. Rains, N. J. A. Sloane and J. Stufken, The Lattice of N-Run Orthogonal Arrays, J. Stat. Planning Inference, 102 (2002), 477-500 (<a href="http://neilsloane.com/doc/rao.txt">Abstract</a>, <a href="http://neilsloane.com/doc/rao.pdf">pdf</a>, <a href="http://neilsloane.com/doc/rao.ps">ps</a>) %Y A048894 Cf. A048893, A048885. %K A048894 nonn %O A048894 1,12 %A A048894 _N. J. A. Sloane_, John Stufken (jstufken(AT)iastate.edu) %E A048894 1<=a(24)<=5 is the first open case.