A261864 - OEIS

%I #23 Sep 06 2015 20:13:06

%S 0,2,4,6,16,62

%N Number of reversible one-dimensional cellular automaton rules with 2 colors and n neighbors.

%H Stephen Wolfram, A New Kind of Science, Wolfram Media 2002, <a href="http://www.wolframscience.com/nksonline/page-1017b-text">Numbers of reversible [cellular automaton] rules</a>, page 1017.

%e For n = 3 there are a(3) = 6 reversible rules depending on 3 neighbors. These are rules 15, 51, 85, 170, 204, and 240 in the Wolfram enumeration.

%Y Cf. A063467.

%K nonn,more

%O 0,2

%A _Eric Rowland_, Sep 04 2015