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 A246327 #12 Feb 04 2015 16:08:29
%S A246327 1,9,21,57,65,81,97,165,233,221,277,361,425,441,585,777,905,777,933,
%T A246327 1045,1173,1225,1593,1833,1981,1725,1757,2429,2365,2701,2881,3093,
%U A246327 3361,3345,3353,3397,3861,4057,4421,4549,4765,5053,5373,5713,5685,5769,6161,6933,7325,7029,7533,7757,8329,7853
%N A246327 Total number of ON cells at stage 2n of two-dimensional 5-neighbor outer totalistic cellular automaton defined by "Rule 457".
%C A246327 The number of ON cells at stage 2n+1 is infinite.
%D A246327 S. Wolfram, A New Kind of Science, Wolfram Media, 2002; pp. 173-175.
%H A246327 N. J. A. Sloane, <a href="/A246327/a246327.pdf">Illustration of first 24 generations</a>
%H A246327 <a href="/index/Ce#cell">Index entries for sequences related to cellular automata</a>
%t A246327 Map[Function[Apply[Plus, Flatten[ #1]]], CellularAutomaton[{ 457, {2, {{0, 2, 0}, {2, 1, 2}, {0, 2, 0}}}, {1, 1}}, {{{1}}, 0}, 130]] (* then take every other term *)
%t A246327 ArrayPlot /@ CellularAutomaton[{457, {2, {{0, 2, 0}, {2, 1, 2}, {0, 2, 0}}}, {1, 1}}, {{{1}}, 0}, 23]
%Y A246327 Cf. A169699, A246316, A246318, A246325, A246326.
%K A246327 nonn
%O A246327 0,2
%A A246327 _N. J. A. Sloane_, Aug 30 2014