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A288520
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0-limiting word of the mapping 00->0101, 10->010, starting with 00.
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4
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0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 1, 0, 1, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 1, 0, 1, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 0, 1, 0, 0, 1, 0
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OFFSET
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1
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COMMENTS
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Iterates, starting with 00:
00
0101
00101
01010101
00100100101
0101010001000101
0010010010010101001010101
010101000100010001001001000100100101
The 0-limiting word is the limit taken over even-numbered iterations of the mapping.
Conjecture: the number of letters (0's and 1's) in the n-th iterate is given by A288523(n).
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LINKS
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EXAMPLE
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The first 4 even-numbered iterates:
00
00101
00100100101
0010010010010101001010101
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MATHEMATICA
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s = {0, 0}; w[0] = StringJoin[Map[ToString, s]];
w[n_] := StringReplace[w[n - 1], {"00" -> "0101", "10" -> "010"}]
Table[w[n], {n, 0, 8}]
st = ToCharacterCode[w[18]] - 48 (* A288520 *)
Flatten[Position[st, 0]] (* A288521 *)
Flatten[Position[st, 1]] (* A288522 *)
Table[StringLength[w[n]], {n, 1, 35}] (* A288523 conjectured *)
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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STATUS
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approved
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