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 A291087 #15 Aug 19 2017 09:56:51 %S A291087 1,1,2,3,2,1,7,11,10,7,3,1,28,46,48,39,24,12,4,1,122,207,233,208,151, %T A291087 92,45,18,5,1,562,977,1154,1099,880,606,356,179,74,25,6,1,2693,4769, %U A291087 5826,5815,4975,3726,2451,1419,714,310,112,33,7,1,13288,23872,29904,30926,27768,22112,15736,10039,5720,2898,1288,496,160,42,8,1 %N A291087 Irregular triangle read by rows: T(n,m) = number of lattice paths of type B^Q terminating at point (n, m). %H A291087 Veronika Irvine, <a href="http://hdl.handle.net/1828/7495">Lace Tessellations: A mathematical model for bobbin lace and an exhaustive combinatorial search for patterns</a>, PhD Dissertation, University of Victoria, 2016. %e A291087 Triangle begins: %e A291087 1,1, %e A291087 2,3,2,1, %e A291087 7,11,10,7,3,1, %e A291087 28,46,48,39,24,12,4,1, %e A291087 122,207,233,208,151,92,45,18,5,1, %e A291087 562,977,1154,1099,880,606,356,179,74,25,6,1, %e A291087 2693,4769,5826,5815,4975,3726,2451,1419,714,310,112,33,7,1, %e A291087 ... %Y A291087 The first two columns are A291091 and A291090. %K A291087 nonn,tabf %O A291087 0,3 %A A291087 _N. J. A. Sloane_, Aug 19 2017