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 A287931 Fixed point of the mapping 00->0010, 1->10, starting with 00. 4
 0, 0, 1, 0, 1, 0, 0, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1 LINKS Clark Kimberling, Table of n, a(n) for n = 1..10000 EXAMPLE Iterates, starting with 00: 00 0010 0010100 0010100100010 00101001000101000100100 001010010001010001001001000100100010100010 MATHEMATICA s = {0, 0}; w[0] = StringJoin[Map[ToString, s]]; w[n_] := StringReplace[w[n - 1], {"00" -> "0010", "1" -> "10"}] Table[w[n], {n, 0, 8}] st = ToCharacterCode[w[11]] - 48   (* A287931 *) Flatten[Position[st, 0]]  (* A287379 *) Flatten[Position[st, 1]]  (* A287380 *) Table[StringLength[w[n]], {n, 1, 35}] (* A278381 conjectured *) CROSSREFS Cf. A287379, A287380, A287381. Sequence in context: A285139 A289011 A289071 * A289074 A289242 A188037 Adjacent sequences:  A287928 A287929 A287930 * A287932 A287933 A287934 KEYWORD nonn,easy AUTHOR Clark Kimberling, Jun 06 2017 STATUS approved

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Last modified April 20 08:32 EDT 2019. Contains 322306 sequences. (Running on oeis4.)