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A064353
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Kolakoski-(1,3) sequence: a(n) is length of n-th run.
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10
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1, 3, 3, 3, 1, 1, 1, 3, 3, 3, 1, 3, 1, 3, 3, 3, 1, 1, 1, 3, 3, 3, 1, 3, 3, 3, 1, 3, 3, 3, 1, 1, 1, 3, 3, 3, 1, 3, 1, 3, 3, 3, 1, 1, 1, 3, 3, 3, 1, 3, 3, 3, 1, 1, 1, 3, 3, 3, 1, 3, 3, 3, 1, 1, 1, 3, 3, 3, 1, 3, 1, 3, 3, 3, 1, 1, 1, 3, 3, 3, 1, 3, 3, 3, 1, 3, 3, 3, 1, 1, 1, 3, 3, 3, 1, 3, 1, 3, 3, 3, 1, 1, 1, 3, 3
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OFFSET
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1,2
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COMMENTS
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The frequency of the number '3' is 0.6027847... See UWC link. - Jaap Spies, Dec 12 2004
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REFERENCES
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E. Angelini, "Jeux de suites", in Dossier Pour La Science, pp. 32-35, Volume 59 (Jeux math'), April/June 2008, Paris.
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LINKS
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Table of n, a(n) for n=1..105.
Michael Baake and Bernd Sing, Kolakoski-(3,1) is a (deformed) model set
UWC, Opgave A (solution)
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PROG
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(Matlab) A = [1 3 3 3]; i = 3; next = 1; while length(A) < 140 A = [A next*ones(1, A(i))]; i = i + 1; next = 4 - next; end
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CROSSREFS
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Cf. A000002, A071820, A071907, A071928, A071942.
Sequence in context: A177693 A131289 A130974 * A190906 A080311 A135368
Adjacent sequences: A064350 A064351 A064352 * A064354 A064355 A064356
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KEYWORD
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nonn,easy,nice
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AUTHOR
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N. J. A. Sloane.
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EXTENSIONS
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More terms from David Wasserman, Jul 16 2002
Edited by Charles R Greathouse IV, Apr 20 2010
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STATUS
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approved
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