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 A222317 #14 May 10 2014 09:50:54 %S A222317 1,1,1,1,1,1,1,1,1,4,1,1,1,11,11,1,1,1,135,2604,135,1,1,1,4381 %N A222317 Triangle read by rows: T(n,k) (n>=3, 1<=k<=n-2) = number of uniform realizable oriented matroids with n elements and rank n-k+1. %D A222317 Fukuda, Komei; Miyata, Hiroyuki; Moriyama, Sonoko. Complete Enumeration of Small Realizable Oriented Matroids. Discrete Comput. Geom. 49 (2013), no. 2, 359--381. MR3017917. (The (4) in the r=4 row of Table 2 should probably be (1).) %e A222317 Triangle begins %e A222317 1 %e A222317 1 1 %e A222317 1 1 1 %e A222317 1 1 1 4 %e A222317 1 1 1 11 11 %e A222317 1 1 1 135 2604 135 %e A222317 1 1 1 4381 unknown unknown unknown %e A222317 ... %Y A222317 Rightmost diagonal is A018242. %Y A222317 Different from A063851. %K A222317 nonn,tabl,more %O A222317 3,10 %A A222317 _N. J. A. Sloane_, Feb 16 2013