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A118108 Decimal representation of n-th iteration of the Rule 54 elementary cellular automaton starting with a single black cell. 2

%I

%S 1,7,17,119,273,1911,4369,30583,69905,489335,1118481,7829367,17895697,

%T 125269879,286331153,2004318071,4581298449,32069089143,73300775185,

%U 513105426295,1172812402961,8209686820727,18764998447377

%N Decimal representation of n-th iteration of the Rule 54 elementary cellular automaton starting with a single black cell.

%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/Rule54.html">Rule 54</a>

%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/ElementaryCellularAutomaton.html">Elementary Cellular Automaton</a>

%F a(n odd) = 7(4^(n+1)-1)/5, a(n even) = (4^(n+2)-1)/15

%e 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; ...

%Y Cf. A118109.

%K nonn,tabf,base

%O 0,2

%A _Eric W. Weisstein_, Apr 13, 2006

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Last modified October 23 03:24 EDT 2014. Contains 248411 sequences.