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A070886
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Triangle read by rows giving successive states of cellular automaton generated by "Rule 90".
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4
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1, 1, 0, 1, 1, 0, 0, 0, 1, 1, 0, 1, 0, 1, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 1, 0, 0, 0, 0, 0, 1, 0, 1, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,1
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COMMENTS
| If either neighbor is 1 then new state is 1, otherwise new state is 0.
Row n has length 2n+1.
Rules #18, #26, #82, #90, #146, #154, #210, #218 all give rise to this sequence. - Hans Havermann
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REFERENCES
| S. Wolfram, A New Kind of Science, Wolfram Media, 2002; p. 25.
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LINKS
| Index entries for sequences related to cellular automata
Eric Weisstein's World of Mathematics, Rule 90
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EXAMPLE
| 1; 1,0,1; 1,0,0,0,1; 1,0,1,0,1,0,1; ...
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CROSSREFS
| Cf. A070950, A070887. Alternate rows of A047999. Interpreted as binary numbers: A038183. Interpreted as Zeckendorf-expansions: A048757. Drawn as binary trees: A080263.
Sequence in context: A039966 A089451 A145099 * A041004 A141736 A134842
Adjacent sequences: A070883 A070884 A070885 * A070887 A070888 A070889
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KEYWORD
| nonn,tabf,nice,easy
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), May 19 2002
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EXTENSIONS
| More terms from Hans Havermann (gladhobo(AT)teksavvy.com), May 26 2002
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