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 A265704 #21 Feb 16 2025 08:33:27 %S A265704 0,1,4,7,13,17,26,31,43,50,62,73,87,99,118,131,153,168,187,207,231, %T A265704 252,275,298,326,352,379,405,438,468,502,533,572,598,637,666,712,744, %U A265704 788,826,871,918,959,1004,1053,1091,1146,1188,1239,1283,1336,1379,1438 %N A265704 Total number of OFF (white) cells after n iterations of the "Rule 135" elementary cellular automaton starting with a single ON (black) cell. %C A265704 This is (apart from an index shift) the same as A110267. The reason is that Rule 135 is obtained from Rule 30 by inverting both colors of the 4 cells correlated by the rules. - _R. J. Mathar_, Dec 16 2015 %D A265704 S. Wolfram, A New Kind of Science, Wolfram Media, 2002; p. 55. %H A265704 Robert Price, <a href="/A265704/b265704.txt">Table of n, a(n) for n = 0..999</a> %H A265704 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/ElementaryCellularAutomaton.html">Elementary Cellular Automaton</a> %H A265704 <a href="/index/Ce#cell">Index entries for sequences related to cellular automata</a> %H A265704 <a href="https://oeis.org/wiki/Index_to_Elementary_Cellular_Automata">Index to Elementary Cellular Automata</a> %Y A265704 Cf. A110267 (essentially the same sequence), A265695. %K A265704 nonn,easy %O A265704 0,3 %A A265704 _Robert Price_, Dec 13 2015