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 A367054 #12 Nov 14 2023 09:17:12 %S A367054 0,0,2,0,0,4,4,0,0,2,2,0,0,8,8,0,0,2,2,0,0,4,4,0,0,2,2,0,0,16,16,0,0, %T A367054 2,2,0,0,4,4,0,0,2,2,0,0,8,8,0,0,2,2,0,0,4,4,0,0,2,2,0,0,32,32,0,0,2, %U A367054 2,0,0,4,4,0,0,2,2,0,0,8,8,0,0,2,2,0,0,4,4,0,0,2,2 %N A367054 Number of iterations until a repeating cycle begins in rule 161 cellular automaton in a cyclic universe of circumference n starting with one cell on. %e A367054 For n = 2 we have: 10 -> 01 -> 10; since the cycle started from the 0th iteration, a(2) = 0. %e A367054 For n = 3 we have: 100 -> 000 -> 111 -> 111; since the cycle started from the 2nd iteration, a(3) = 2. %Y A367054 Cf. A334506, A000029. %K A367054 nonn %O A367054 1,3 %A A367054 _Angelo Rosso_, Nov 03 2023