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 A335796 #5 Dec 23 2020 19:58:34 %S A335796 0,1,9,17,33,41,97,129,193,209,265,313,433,481,609,705,849,889,977, %T A335796 1073,1241,1369,1641,1769,2025,2089,2225,2337,2601,2793,3113,3337, %U A335796 3705,3785,3921,4081,4361,4601,5033,5273,5641,5849,6193,6449,6937,7161,7641,7929,8489,8625,8857,9145 %N A335796 Number of ON cells at n-th generation in the "Ulam-Warburton and Friedkin Replicator" hybrid two-dimensional cellular automaton. %C A335796 The 2D CA uses the Moore neighborhood (all eight orthogonally and diagonally adjacent cells are in the neighborhood). %C A335796 Generation follows the following algorithm: If a cell has an even number of ON neighbors and it is currently OFF, stay OFF; otherwise turn ON. %Y A335796 Cf. A147562, A247666, A335794 %K A335796 nonn %O A335796 0,3 %A A335796 _Cody B Duncan_, Jun 24 2020