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A003324
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A nonrepetitive sequence.
(Formerly M0443)
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0
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1, 2, 3, 4, 1, 4, 3, 2, 1, 2, 3, 2, 1, 4, 3, 4, 1, 2, 3, 4, 1, 4, 3, 4, 1, 2, 3, 2, 1, 4, 3, 2, 1, 2, 3, 4, 1, 4, 3, 2, 1, 2, 3, 2, 1, 4, 3, 2, 1, 2, 3, 4, 1, 4, 3, 4, 1, 2, 3, 2, 1, 4, 3, 4, 1, 2, 3, 4, 1
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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REFERENCES
| Dean, Richard A.; A sequence without repeats on x, x^{-1}, y, y^{-1}. Amer. Math. Monthly 72 1965 383-385.
Dejean, F.; Sur un theoreme de Thue. J. Combinatorial Theory Ser. A 13 (1972), 90-99.
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
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CROSSREFS
| Sequence in context: A138223 A194742 A159798 * A110630 A129717 A117742
Adjacent sequences: A003321 A003322 A003323 * A003325 A003326 A003327
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KEYWORD
| nonn,nice
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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