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 A059318 #13 Mar 23 2017 11:47:18 %S A059318 1,1,1,1,1,0,0,0,1,1,1,0,1,0,1,1,1,0,1,0,1,0,1,0,1,1,1,1,0,0,0,0,0,1, %T A059318 1,1,1,0,0,0,0,0,1,0,0,0,0,0,1,1,1,0,1,1,0,1,1,1,0,1,1,0,1,1,1,0,1,0, %U A059318 0,0,0,0,0,0,0,0,0,0,1,0,1,1,1,1,0,1,1,1,0,1,1,1,0,1,1,1,0,1,1,1,1,0,0,0,1 %N A059318 Pascal's "rhombus" (actually a triangle) mod 2, read by rows: each entry is sum modulo 2 of 3 terms above it in previous row and one term above it two rows back. %C A059318 Also, the triangle, read by rows, of successive generations in the reversible cellular automaton RCA(3) when started with a single ON cell at generation 0. - _Robert Price_, Mar 22 2017 %D A059318 Macfarlane, Alan J. "Linear reversible second-order cellular automata and their first-order matrix equivalents." Journal of Physics A: Mathematical and General 37.45 (2004): 10791. See Fig. 4. %H A059318 J. Goldwasser et al., <a href="http://dx.doi.org/10.1016/S0012-365X(98)00373-2">The density of ones in Pascal's rhombus</a>, Discrete Math., 204 (1999), 231-236. %H A059318 Paul K. Stockmeyer, <a href="http://arxiv.org/abs/1504.04404">The Pascal Rhombus and the Stealth Configuration</a>, arXiv:1504.04404 [math.CO], 2015. %H A059318 <a href="/index/Ce#cell">Index entries for sequences related to cellular automata</a> %H A059318 <a href="https://oeis.org/wiki/Index_to_Elementary_Cellular_Automata">Index to Elementary Cellular Automata</a> %e A059318 1; 1,1,1; 1,0,0,0,1; 1,1,0,1,0,1,1; ... %Y A059318 Cf. A059317, A059319, A059320, A007318, A284208, A284209. %K A059318 tabf,easy,nonn %O A059318 0,1 %A A059318 _N. J. A. Sloane_, Jan 26 2001 %E A059318 More terms from Larry Reeves (larryr(AT)acm.org), Jan 30 2001