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 A168114 #9 Feb 24 2021 02:48:18 %S A168114 3,6,7,8,9,16,17,12,9,16,19,22,31,46,41,20,9,16,19,22,31,46,43,30,31, %T A168114 48,57,72,105,130,97,36,9,16,19,22,31,46,43,30,31,48,57,72,105,130,99, %U A168114 46,31,48,57,72,105,132,113,88,107,150,183,246,337,354,225 %N A168114 If A168113 is regarded as a triangle then the rows converge to this sequence. %H A168114 David Applegate, Omar E. Pol and N. J. A. Sloane, <a href="/A000695/a000695_1.pdf">The Toothpick Sequence and Other Sequences from Cellular Automata</a>, Congressus Numerantium, Vol. 206 (2010), 157-191. [There is a typo in Theorem 6: (13) should read u(n) = 4.3^(wt(n-1)-1) for n >= 2.] %H A168114 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> %Y A168114 Cf. A139250, A147646, A168112, A168113. %K A168114 nonn %O A168114 1,1 %A A168114 _Omar E. Pol_, Dec 07 2009 %E A168114 Terms after a(15) from _Nathaniel Johnston_, Mar 28 2011