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 A202700 #10 Oct 20 2014 17:15:13 %S A202700 0,1,1,2,1,0,17,19,20,20,76,59,40,20,0 %N A202700 The third of a set of three triangles constructed by the same rule as A202692-A202694, but where the top entries in the three triangles are 0,1,0 respectively. %H A202700 M. Josuat-Verges, J.-C. Novelli and J.-Y. Thibon, <a href="http://arxiv.org/abs/1110.5272">The algebraic combinatorics of snakes</a>, arXiv preprint arXiv:1110.5272, 2011 %e A202700 Triangle begins: %e A202700 0 %e A202700 1 1 %e A202700 2 1 0 %e A202700 17 19 20 20 %e A202700 76 59 40 20 0 %e A202700 ... %Y A202700 See A202698 for further information. %K A202700 nonn,tabl,more %O A202700 1,4 %A A202700 _N. J. A. Sloane_, Dec 23 2011