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Search: id:A118108
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| A118108 |
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Decimal representation of n-th iteration of the rule 54 elementary cellular automaton starting with a single black cell. |
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+0
2
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| 1, 7, 17, 119, 273, 1911, 4369, 30583, 69905, 489335, 1118481, 7829367, 17895697, 125269879, 286331153, 2004318071, 4581298449, 32069089143, 73300775185, 513105426295, 1172812402961, 8209686820727, 18764998447377
(list; graph; listen)
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OFFSET
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0,2
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LINKS
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Eric Weisstein's World of Mathematics, Rule 54
Eric Weisstein's World of Mathematics, Elementary Cellular Automaton
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FORMULA
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a(n odd) = 7(4^(n+1)-1)/5, a(n even) = (4^(n+2)-1)/15
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EXAMPLE
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1; 1, 1, 1; 1, 0, 0, 0, 1; 1, 1, 1, 0, 1, 1, 1; 1, 0, 0, 0, 1, 0, 0, 0, 1; ...
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CROSSREFS
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Cf. A118109.
Sequence in context: A068172 A067185 A063384 this_sequence A061159 A140122 A092240
Adjacent sequences: A118105 A118106 A118107 this_sequence A118109 A118110 A118111
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KEYWORD
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nonn,tabf
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AUTHOR
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Eric Weisstein (eric(AT)weisstein.com), Apr 13, 2006
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