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 A092400 Fixed point of the morphism 1 -> 1121211, 2 -> 1121212121211, starting from a(1) = 1. 1
 1, 1, 2, 1, 2, 1, 1, 1, 1, 2, 1, 2, 1, 1, 1, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 1, 1, 1, 2, 1, 2, 1, 1, 1, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 1, 1, 1, 2, 1, 2, 1, 1, 1, 1, 2, 1, 2, 1, 1, 1, 1, 2, 1, 2, 1, 1, 1, 1, 2, 1, 2, 1, 1, 1, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 1, 1, 1, 2, 1, 2, 1, 1, 1, 1, 2, 1, 2, 1, 2, 1, 2, 1 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 COMMENTS Length of n-th run of identical symbols in A051069. LINKS FORMULA Sum_{k=1..n} a(k) = A007417(n). MATHEMATICA Nest[ Function[ l, {Flatten[(l /. {1 -> {1, 1, 2, 1, 2, 1, 1}, 2 -> {1, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 1}})]}], {1}, 3] (* Robert G. Wilson v, Feb 26 2005 *) CROSSREFS Cf. A007417, A051069. Sequence in context: A184240 A244840 A103414 * A303598 A337277 A269974 Adjacent sequences:  A092397 A092398 A092399 * A092401 A092402 A092403 KEYWORD easy,nonn AUTHOR Philippe Deléham, Mar 21 2004 EXTENSIONS More terms from Robert G. Wilson v, Feb 26 2005 STATUS approved

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Last modified December 2 09:52 EST 2020. Contains 338876 sequences. (Running on oeis4.)