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 A237118 #22 Feb 16 2025 08:33:21 %S A237118 0,0,1,2,3,4,5,6,8,10,12,14,16,19,22,25,28,31,36,40,43,47,51,53,56,60, %T A237118 65,71,74,80,86,90,94,99,104,109,113 %N A237118 Number of white areas in the graph of elementary cellular automaton with rule 30 at generation n. %H A237118 Philippe Beaudoin, <a href="/A237118/b237118.txt">Table of n, a(n) for n = 0..999</a> %H A237118 Philippe Beaudoin, <a href="/A237118/a237118_1.py.txt">Python program to generate this sequence.</a> %H A237118 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/Rule30.html">Rule 30.</a> %Y A237118 Cf. A070950 (rule 110), A237119 (analog for rule 110), A237120 (analog for rule 150). A226482(n) - 1 is the number of white areas on the line corresponding to generation n. %K A237118 nonn %O A237118 0,4 %A A237118 _Philippe Beaudoin_, Feb 03 2014