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 A063853 #17 Feb 08 2023 11:05:21 %S A063853 1,1,3,1,5,11,1,8,55,93,1,11,204,5083,2121,1,15,705,505336,10775236, %T A063853 122508,1,19,2293 %N A063853 Triangle T(n,k) (n >= 3, k = 1..n-2) read by rows giving number of abstract order types of configurations of n points in n-k dimensions. %H A063853 Lukas Finschi, <a href="http://www.om.math.ethz.ch">Homepage of Oriented Matroids</a> %H A063853 Lukas Finschi, <a href="https://finschi.com/math/publ/2001-08-31_Finschi_A-Graph-Theoretical-Approach-for-Reconstruction-and-Generation-of-Oriented-Matroids.pdf">A Graph Theoretical Approach for Reconstruction and Generation of Oriented Matroids</a>, A dissertation submitted to the Swiss Federal Institute of Technology, Zurich for the degree of Doctor of Mathematics, 2001. %H A063853 Lukas Finschi and K. Fukuda, <a href="http://www.ifor.math.ethz.ch/staff/finschi/ccgospcaha/ccgospcaha.pdf">Complete combinatorial generation of small point set configurations and hyperplane arrangements</a>, pp. 97-100 in Abstracts 13th Canadian Conference on Computational Geometry (CCCG '01), Waterloo, Aug. 13-15, 2001. %e A063853 Triangle begins: %e A063853 1; %e A063853 1,3; %e A063853 1,5,11; %e A063853 1,8,55,93; %e A063853 ... %Y A063853 Diagonals give A063854, A063855, A063856, A246990, A246991. Row sums give A063857. %K A063853 nonn,tabl,nice,more %O A063853 3,3 %A A063853 _N. J. A. Sloane_, Aug 26 2001