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 A299771 #18 Feb 06 2019 06:10:33 %S A299771 1,4,8,8,12,16,16,8,24,8 %N A299771 a(n) is the number of elements added at n-th stage in the structure of the finite cellular automaton of A299770. %C A299771 The word of this cellular automaton is abcd. For more information see A296612. %H A299771 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> %H A299771 <a href="/index/Ce#cell">Index entries for sequences related to cellular automata</a> %H A299771 <a href="/index/To#toothpick">Index entries for sequences related to toothpick sequences</a> %e A299771 The finite sequence can be written as an array of four columns as shown below: %e A299771 1, 4, 8, 8; %e A299771 12, 16, 16, 8; %e A299771 24, 8. %e A299771 The first column gives the number of toothpicks of length 2. %e A299771 The second column gives the number of D-toothpicks of length sqrt(2). %e A299771 The third column gives the number of toothpicks of length 1. %e A299771 The fourth column gives the number of T-toothpicks. %e A299771 The sequence contains exactly 10 terms. %Y A299771 Very similar to A294963. %Y A299771 Cf. A299770, A296612. %Y A299771 Cf. A139251 (toothpicks), A160173 (T-toothpicks), A194701 (D-toothpicks), A220501. %Y A299771 For other hybrid cellular automata, see A289841, A290221, A294021, A294981. %K A299771 nonn,tabf,fini,full %O A299771 1,2 %A A299771 _Omar E. Pol_, Mar 20 2018