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 A085587 #18 May 05 2020 20:53:59 %S A085587 1,1,1,1,3,2,7,1,7,6,31,4,63,14,15,1,15,14,511,12,63,62,2047,8,1023, %T A085587 126,511,28,16383,30,31,1,31,30,4095,28,87381,1022,4095,24,1023,126, %U A085587 127,124,4095,4094,8388607,16,2097151,2046,255,252,67108863,1022,1048575,56,511,32766,536870911,60 %N A085587 Eventual period of a single cell in rule 90 cellular automaton in a cyclic universe of width n. %H A085587 O. Martin, A. M. Odlyzko, S. Wolfram, <a href="http://projecteuclid.org/euclid.cmp/1103941055">Algebraic properties of cellular automata</a>, Comm. Math. Physics, 93 (1984), pp. 219-258, Reprinted in Theory and Applications of Cellular Automata, S. Wolfram, Ed., World Scientific, 1986, pp. 51-90 and in Cellular Automata and Complexity: Collected Papers of Stephen Wolfram, Addison-Wesley, 1994, pp. 71-113. See Table 1. %H A085587 S. Wolfram, <a href="http://dx.doi.org/10.1103/RevModPhys.55.601">Statistical mechanics of cellular automata</a>, Rev. Mod. Phys., 55 (1983), 601-644. (See Section 4.) [Added by _N. J. A. Sloane_, Apr 20 2010] %Y A085587 Cf. A085588, A085589, A085590, A085591, A085592, A085593, A085595. %Y A085587 Cf. also A180001, A334496, A334499-A334515. %K A085587 nonn %O A085587 1,5 %A A085587 _N. J. A. Sloane_, Jul 03 2003 %E A085587 More terms from _Sean A. Irvine_, Jun 10 2018 %E A085587 Definition edited by _N. J. A. Sloane_, May 05 2020