login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo

Please make a donation to keep the OEIS running. We are now in our 56th year. In the past year we added 10000 new sequences and reached almost 9000 citations (which often say "discovered thanks to the OEIS").
Other ways to donate

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A176405 Fixed point of morphism 0->0100110, 1->0110110 4
0, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 1, 1, 0, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 1, 0, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 1, 0, 0, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 1, 0, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 0, 1, 1, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

COMMENTS

Also a(n) is the least significant nonzero digit in the radix-7 expansion of (n+1).

The sequence, interpreted as left/right turns by 120 degrees (each turn followed by a unit line in the current direction) defines a space-filling curve (called R7-dragon in the fxtbook, see link below).

Also sequence of zeros and ones by morphism F->F0F1F1F0F0F1F, 0->0, 1->1.

LINKS

Table of n, a(n) for n=0..104.

Joerg Arndt: Matters Computational (The Fxtbook) (section 1.31.5 "Dragon curves based on radix-R counting", pp. 95-101, image on p. 97).

MATHEMATICA

Nest[Flatten[#/.{0->{0, 1, 0, 0, 1, 1, 0}, 1->{0, 1, 1, 0, 1, 1, 0}}]&, 0, 3] (* Harvey P. Dale, Mar 27 2015 *)

CROSSREFS

Sequence in context: A286339 A244735 A245938 * A084091 A080846 A082401

Adjacent sequences:  A176402 A176403 A176404 * A176406 A176407 A176408

KEYWORD

nonn

AUTHOR

Joerg Arndt, Apr 16 2010

STATUS

approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified December 1 07:14 EST 2020. Contains 338833 sequences. (Running on oeis4.)