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 A202699 #11 Oct 20 2014 17:15:13 %S A202699 1,0,1,3,3,2,9,12,15,17,129,120,108,93,76 %N A202699 The second 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 A202699 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 A202699 Triangle begins: %e A202699 1 %e A202699 0 1 %e A202699 3 3 2 %e A202699 9 12 15 17 %e A202699 129 120 108 93 76 %e A202699 ... %Y A202699 See A202698 for further information. %K A202699 nonn,tabl,more %O A202699 1,4 %A A202699 _N. J. A. Sloane_, Dec 23 2011