Search: id:A118173
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%I A118173
%S A118173 1,3,5,15,29,55,93,247,477,887,1501,3959,7645,14199,24029,63351,122333,
%T A118173 227191,384477,1013623,1957341,3635063,6151645,16217975,31317469,
%U A118173 58161015,98426333,259487607,501079517,930576247,1574821341,4151801719
%N A118173 Decimal representation of n-th iteration of the Rule 188 elementary cellular 
               automaton starting with a single black cell.
%H A118173 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               Rule188.html">Rule 188</a>
%H A118173 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               ElementaryCellularAutomaton.html">Elementary Cellular Automaton</
               a>
%F A118173 a(n odd) = (1/30)*(-14+3*I*(2*I)^n+55*2^n), a(n even) = (1/15)*(-13+3*(2*I)^n+25*2^n)
%e A118173 1; 0, 1, 1; 0, 0, 1, 0, 1; 0, 0, 0, 1, 1, 1, 1; 0, 0, 0, 0, 1, 1, 1, 
               0, 1; ...
%Y A118173 Cf. A118174.
%Y A118173 Sequence in context: A146457 A051044 A003536 this_sequence A079450 A166956 
               A048738
%Y A118173 Adjacent sequences: A118170 A118171 A118172 this_sequence A118174 A118175 
               A118176
%K A118173 nonn
%O A118173 0,2
%A A118173 Eric Weisstein (eric(AT)weisstein.com), Apr 13, 2006

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