A261864 Number of reversible one-dimensional cellular automaton rules with 2 colors and n neighbors.

0, 2, 4, 6, 16, 62

Offset

0,2

Links

Table of n, a(n) for n=0..5.

Stephen Wolfram, A New Kind of Science, Wolfram Media 2002, Numbers of reversible [cellular automaton] rules, page 1017.

Example

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.

Crossrefs

Cf. A063467.

Sequence in context: A032503 A050838 A271842 * A071243 A112086 A070325

Adjacent sequences: A261861 A261862 A261863 * A261865 A261866 A261867

Keyword

nonn,more

Author

Eric Rowland, Sep 04 2015

Status

approved