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A217522

Squarefree ternary sequence derived from bi-infinite squarefree ternary sequence of Kurosaki.

0, 1, 2, 1, 0, 2, 1, 2, 0, 1, 0, 2, 0, 1, 2, 0, 2, 1, 2, 0, 1, 0, 2, 1, 0, 1, 2, 1, 0, 2, 0, 1, 2, 0, 2, 1, 0, 1, 2, 1, 0, 2, 1, 2, 0, 2, 1, 0, 1, 2, 0, 1, 0, 2, 1, 2, 0, 2, 1, 0, 2, 0

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OFFSET

1,3

COMMENTS

Generated by infinitely iterating the morphism 0->012 1->103 2->430 3->521 4->254 5->345 starting with 0; then replacing i with 5-i for 3<=i<=5. - Jeffrey Shallit, Jan 31 2026

LINKS

Table of n, a(n) for n=1..62.

Serina Camungol and Narad Rampersad, Concerning Kurosaki’s Squarefree Word, Journal of Integer Sequences, Vol. 16 (2013), Article 13.9.4.

Tetsuo Kurosaki, Direct definition of a ternary infinite square-free sequence, Info. Proc. Letters 106 (2008), 175-179.

Tetsuo Kurosaki, Direct definition of a ternary infinite square-free sequence, arxiv preprint arXiv:0712.0139 [cs.DM], December 2 2007.

Klaus Sutner and Sam Tetruashvili, Inferring Automatic Sequences

CROSSREFS

Sequence in context: A185205 A029295 A185204 * A287520 A130094 A337005

Adjacent sequences: A217519 A217520 A217521 * A217523 A217524 A217525

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Oct 07 2012

STATUS

approved

URL: https://oeis.org/A217522

⇱ A217522 - OEIS