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 A202701 #10 Oct 20 2014 17:15:13 %S A202701 0,0,0,1,1,1,0,1,2,3,53,53,52,50,47 %N A202701 The first of a set of three triangles constructed by the same rule as A202692-A202694, but where the top entries in the three triangles are 0,0,1 respectively. %H A202701 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 A202701 The triangle begins: %e A202701 0 %e A202701 0 0 %e A202701 1 1 1 %e A202701 0 1 2 3 %e A202701 53 53 52 50 47 %e A202701 ... %e A202701 The three triangles together: %e A202701 0 0 1 %e A202701 0 0 0 0 0 1 %e A202701 1 1 1 1 1 1 1 1 0 %e A202701 0 1 2 3 3 4 5 6 6 7 8 8 %e A202701 53 53 52 50 47 47 44 40 35 29 29 23 16 8 0 %Y A202701 The three triangles are A202701, A202702, A202703. %K A202701 nonn,tabl,more %O A202701 1,9 %A A202701 _N. J. A. Sloane_, Dec 23 2011