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 A299780 #27 Jul 05 2019 18:48:13 %S A299780 11,0,20,0,22,39,0,33,85,33,0,74,149,94,15,0,100,284,187,92,10,0 %N A299780 Triangle read by rows: T(n,m) = number of n-uniform tilings having m different arrangements of polygons about their vertices, n >= 1 and 1 <= m <= n. %C A299780 Taken from _Brian Galebach_'s square array (see link). %H A299780 Brian L. Galebach, <a href="http://ProbabilitySports.com/tilings.html">n-Uniform Tilings</a> %H A299780 José Ezequiel Soto Sánchez, Asla Medeiros e Sá, Luiz Henrique de Figueiredo, <a href="https://doi.org/10.1007/s00371-019-01665-y">Acquiring periodic tilings of regular polygons from images</a>, The Visual Computer (2019) Vol. 35, Issue 6-8, 899-907. %e A299780 Triangle begins: %e A299780 11; %e A299780 0, 20; %e A299780 0, 22, 39; %e A299780 0, 33, 85, 33; %e A299780 0, 74, 149, 94, 15; %e A299780 0, 100, 284, 187, 92, 10; %e A299780 ... %e A299780 Other known positive terms are T(7,7) = 7, T(8,7) = 20, T(9,8) = 8, T(10,8) = 27 and T(11,9) = 1. %Y A299780 Row sums gives A068599. %Y A299780 Leading diagonal is A068600. %Y A299780 Column 1 gives 11 together with A000004. %Y A299780 Cf. A299781, A299782. %K A299780 nonn,tabl,hard,more %O A299780 1,1 %A A299780 _Omar E. Pol_, Mar 30 2018