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A118173
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Decimal representation of n-th iteration of the Rule 188 elementary cellular automaton starting with a single black cell.
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1
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1, 3, 5, 15, 29, 55, 93, 247, 477, 887, 1501, 3959, 7645, 14199, 24029, 63351, 122333, 227191, 384477, 1013623, 1957341, 3635063, 6151645, 16217975, 31317469, 58161015, 98426333, 259487607, 501079517, 930576247, 1574821341, 4151801719
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OFFSET
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0,2
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LINKS
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Table of n, a(n) for n=0..31.
Eric Weisstein's World of Mathematics, Rule 188
Eric Weisstein's World of Mathematics, Elementary Cellular Automaton
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FORMULA
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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)
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EXAMPLE
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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; ...
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CROSSREFS
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Cf. A118174.
Sequence in context: A146457 A051044 A003536 * A079450 A166956 A048738
Adjacent sequences: A118170 A118171 A118172 * A118174 A118175 A118176
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KEYWORD
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nonn
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AUTHOR
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Eric W. Weisstein, Apr 13, 2006
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STATUS
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approved
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