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 A169709 #8 Jan 21 2016 17:44:10
%S A169709 1,5,9,21,29,41,61,89,101,113,133,161,189,233,309,377,397,409,429,457,
%T A169709 485,529,605,673,709,753,821,905,1005,1169,1413,1569,1605,1617,1637,
%U A169709 1665,1693,1737,1813,1881,1917,1961,2029,2113,2213,2377,2621,2777,2829,2873,2941
%N A169709 Total number of ON cells at stage n of two-dimensional cellular automaton defined by "Rule 1006".
%C A169709 Square grid, 4 neighbors per cell, turn ON iff exactly 1, 3 or 4 neighbors are ON; once ON, cells stay ON.
%D A169709 S. Wolfram, A New Kind of Science, Wolfram Media, 2002; p. 928.
%H A169709 David Applegate, <a href="/A139250/a139250.anim.html">The movie version</a>
%H A169709 N. J. A. Sloane, <a href="/wiki/Catalog_of_Toothpick_and_CA_Sequences_in_OEIS">Catalog of Toothpick and Cellular Automata Sequences in the OEIS</a>
%H A169709 <a href="/index/Ce#cell">Index entries for sequences related to cellular automata</a>
%t A169709 Map[Function[Apply[Plus,Flatten[ #1]]], CellularAutomaton[{ 1006, {2,{{0,2,0},{2,1,2},{0,2,0}}},{1,1}},{{{1}},0},100]]
%Y A169709 Cf. A139250, A151725, A147562, A147582, A169648, A169649, A169707, A169708, A169710.
%K A169709 nonn
%O A169709 0,2
%A A169709 _N. J. A. Sloane_, Apr 17 2010