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Search: id:A118171
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| A118171 |
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Decimal representation of n-th iteration of the Rule 158 elementary cellular automaton starting with a single black cell. |
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+0
2
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| 1, 7, 29, 115, 477, 1843, 7645, 29491, 122333, 471859, 1957341, 7549747, 31317469, 120795955, 501079517, 1932735283, 8017272285, 30923764531, 128276356573, 494780232499, 2052421705181, 7916483719987, 32838747282909
(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 158
Eric Weisstein's World of Mathematics, Elementary Cellular Automaton
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FORMULA
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a(n)=(1/30)*(-16+(-4)^n-10*(-1)^n+55*4^n)
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EXAMPLE
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1; 1, 1, 1; 1, 1, 1, 0, 1; 1, 1, 1, 0, 0, 1, 1; 1, 1, 1, 0, 1, 1, 1, 0, 1; ...
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CROSSREFS
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Cf. A118172.
Sequence in context: A049349 A124828 A037094 this_sequence A072261 A066744 A037576
Adjacent sequences: A118168 A118169 A118170 this_sequence A118172 A118173 A118174
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KEYWORD
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nonn
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AUTHOR
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Eric Weisstein (eric(AT)weisstein.com), Apr 13, 2006
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