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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

User: Jiri Hladky

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Jiri Hladky has authored 1 sequences.

A347290 Arnoux-Rauzy word sigma_0 x sigma_2 x sigma_1. Fixed point of the morphism 0-> 0201020, 1->1020, 2->201020 starting from a(1)=0.

Original entry on oeis.org

0, 2, 0, 1, 0, 2, 0, 2, 0, 1, 0, 2, 0, 0, 2, 0, 1, 0, 2, 0, 1, 0, 2, 0, 0, 2, 0, 1, 0, 2, 0, 2, 0, 1, 0, 2, 0, 0, 2, 0, 1, 0, 2, 0, 2, 0, 1, 0, 2, 0, 0, 2, 0, 1, 0, 2, 0, 1, 0, 2, 0, 0, 2, 0, 1, 0, 2, 0, 2, 0, 1, 0, 2, 0, 0
Offset: 1

Author

Jiri Hladky, Aug 29 2021

Keywords

Comments

Arnoux-Rauzy word sigma_0 x sigma_2 x sigma_1, where sigmas are defined as:
sigma_0 : 0 -> 0, 1 -> 10, 2 -> 20;
sigma_1 : 0 -> 01, 1 -> 1, 2 -> 21;
sigma_2 : 0 -> 02, 1 -> 12, 2 -> 2.
Fixed point of the morphism 0->0201020, 1->1020, 2->201020 starting from a(1)=0.
Frequency of letters:
0: 1/t ~ 54.368% (A192918)
1: 1/t^3 ~ 16.071%
2: 1/t^2 ~ 29.559%
where t is tribonacci constant A058265.
Equals A286998 with a re-mapping of values 1->2, 2->1.

Crossrefs

Cf. A080843 A286998 (values 0,2,1), A058265.

Programs

  • Mathematica
    Nest[ Flatten[# /. {0 -> {0, 2, 0, 1, 0, 2, 0}, 1 -> {1, 0, 2, 0}, 2 -> {2, 0, 1, 0, 2, 0}}] &, {0}, 3]