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 A162625 #16 Feb 24 2021 02:48:18 %S A162625 3,4,6,6,8,12,14,10,8,12,16,20,28,36,34,18,8,12,16,20,28,36,36,28,28, %T A162625 40,52,68,92,104,82,34,8,12,16,20,28,36,36,28,28,40,52,68,92,104,84, %U A162625 44,28,40,52,68,92,108,100,84,96,132,172,228,288,288,194,66,8 %N A162625 Number of cells turned "ON" at n-th stage of cellular automaton whose virtual skeleton is a polyedge as the toothpick structure of A139250. %C A162625 First differences of A147614. %C A162625 The main entry for this sequence is A139250, the toothpick sequence. See also A139251. %H A162625 Jinyuan Wang, <a href="/A162625/b162625.txt">Table of n, a(n) for n = 1..1000</a> %H A162625 David Applegate, <a href="/A139250/a139250.anim.html">The movie version</a> %H A162625 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 A162625 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 A162625 Cf. A139250, A139251, A147614, A160420, A160421, A160422, A160423, A162627. %K A162625 nonn %O A162625 1,1 %A A162625 _Omar E. Pol_, Aug 05 2009 %E A162625 More terms from _Nathaniel Johnston_, Nov 15 2010 %E A162625 More terms from _Jinyuan Wang_, Mar 03 2020