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A174444 Consider the cellular automaton defined by rule 22 in a finite, circular universe of width n.  Then a single live cell eventually becomes an oscillator of period a(n). 1
1, 1, 1, 1, 1, 1, 1, 1, 4, 4, 4, 4, 5, 1, 1, 1, 12, 12, 12, 12, 8, 8, 8, 8, 55, 28, 28, 28, 30, 1, 1, 1, 28, 28, 28, 28, 24, 24, 24, 24, 116, 124, 124, 124, 16, 16, 16, 16, 162, 252, 252, 252, 56, 56, 56, 56, 461, 60, 60, 60, 1, 1, 1, 1, 60, 60, 60, 60, 56, 56 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,9

LINKS

Alois P. Heinz, Table of n, a(n) for n = 1..184

EXAMPLE

For n=9, start with a 9-cell wide grid, and assume that the edges wrap around.  In generation 0, the pattern is 000010000

The progression is

000010000

000111000

001000100

011101110

100000001

010000010

111000111

000101000

001101100

010000010

At which point the pattern becomes an oscillator of period 4.  Thus, a(9)=4.

CROSSREFS

Sequence in context: A228423 A165923 A228729 * A268237 A276866 A331842

Adjacent sequences:  A174441 A174442 A174443 * A174445 A174446 A174447

KEYWORD

nonn

AUTHOR

Ben Branman, Nov 28 2010

EXTENSIONS

More terms from Alois P. Heinz, Jan 17 2011

STATUS

approved

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Last modified July 5 07:06 EDT 2020. Contains 335460 sequences. (Running on oeis4.)