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 A039927 #23 Mar 05 2020 03:17:47 %S A039927 0,1,1,1,1,1,1,1,1,1,1,4,1,1,1,2,1,2,1,4,1,1,1 %N A039927 Number of types of maximal mixed orthogonal arrays with n runs. %C A039927 Number of dual atoms in lattice of parameters of mixed orthogonal arrays with n runs and strength 2. %C A039927 a(36) is the first unknown term. %D A039927 A. S. Hedayat, N. J. A. Sloane and J. Stufken, Orthogonal Arrays, Springer-Verlag, NY, 1999. %H A039927 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>). %H A039927 Eric D. Schoen, Pieter T. Eendebak and Man V. M. Nguyen, <a href="https://doi.org/10.1002/jcd.20236">Complete enumeration of pure-level and mixed-level orthogonal arrays</a>, Journal of Combinatorial Designs, Volume 18, Issue 2, pages 123-140, March 2010; DOI: 10.1002/jcd.20236; <a href="https://doi.org/10.1002/jcd.20270">Correction</a>: Journal of Combinatorial Designs, Volume 18, Issue 6, page 488, November 2010; DOI: 10.1002/jcd.20270. %Y A039927 Cf. A039930, A039931. %K A039927 nonn,nice,more %O A039927 1,12 %A A039927 _N. J. A. Sloane_ %E A039927 Needs to be updated using the results of Schoen et al. (2010). - _N. J. A. Sloane_, Feb 21 2013