The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A246960 Directions of the lines in the (Heighway) Dragon Curve. 7
 0, 1, 2, 1, 2, 3, 2, 1, 2, 3, 0, 3, 2, 3, 2, 1, 2, 3, 0, 3, 0, 1, 0, 3, 2, 3, 0, 3, 2, 3, 2, 1, 2, 3, 0, 3, 0, 1, 0, 3, 0, 1, 2, 1, 0, 1, 0, 3, 2, 3, 0, 3, 0, 1, 0, 3, 2, 3, 0, 3, 2, 3, 2, 1, 2, 3, 0, 3, 0, 1, 0, 3, 0, 1, 2, 1, 0, 1, 0, 3, 0, 1, 2, 1, 2, 3, 2, 1, 0, 1, 2, 1, 0, 1, 0, 3, 2, 3, 0, 3, 0, 1, 0, 3, 0 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 COMMENTS Fixed point of the morphism: 0 --> 01, 1 --> 21, 2 --> 23, 3 --> 03. LINKS Joerg Arndt, Table of n, a(n) for n = 0..16383 Joerg Arndt, Matters Computational (The Fxtbook), pp. 88-92; image of the dragon curve on p. 89 (top): 0 for north, 1 for west, 2 for south, and 3 for east. FORMULA a(n) = A005811(n) mod 4. - Joerg Arndt, Sep 09 2014 a(n) = A105500(n) - 1. - Filip Zaludek, Dec 16 2016 MATHEMATICA Nest[Flatten[# /. {0 -> {0, 1}, 1 -> {2, 1}, 2 -> {2, 3}, 3 -> {0, 3}}] &, {0}, 7] CROSSREFS Cf. A014577, A106665. n where a(n) = 0,1,2,3 respectively: A043724, A043725, A043726, A043727. Sequence in context: A338170 A066856 A089280 * A285200 A308567 A192099 Adjacent sequences: A246957 A246958 A246959 * A246961 A246962 A246963 KEYWORD nonn,easy AUTHOR Robert G. Wilson v, Sep 08 2014 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified April 21 19:32 EDT 2024. Contains 371885 sequences. (Running on oeis4.)