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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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1
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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; refs; listen; history; internal format)
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OFFSET
| 0,2
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LINKS
| Eric Weisstein's World of Mathematics, Rule 158
Eric Weisstein's World of Mathematics, Elementary Cellular Automaton
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FORMULA
| a(n)=(1/30)*(-16+(-4)^n-10*(-1)^n+55*4^n)
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EXAMPLE
| 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
| Cf. A118172.
Sequence in context: A049349 A124828 A037094 * A072261 A066744 A037576
Adjacent sequences: A118168 A118169 A118170 * A118172 A118173 A118174
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KEYWORD
| nonn
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AUTHOR
| Eric Weisstein (eric(AT)weisstein.com), Apr 13, 2006
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