The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A275117 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
Showing entries 1-10 | older changes

A275117

Direction where Langton's ant is looking after n moves: 1 if looking in starting direction, 2 if looking 90 degrees clockwise from starting direction, 3 if looking 90 degrees counterclockwise from starting direction, or 4 if looking in direction opposite to starting direction.
(history; published version)

#21 by Joerg Arndt at Sat May 29 02:12:13 EDT 2021

STATUS

reviewed

approved

#20 by Michel Marcus at Fri May 28 17:02:05 EDT 2021

STATUS

proposed

reviewed

#19 by Robert C. Lyons at Fri May 28 16:42:14 EDT 2021

STATUS

editing

proposed

#18 by Robert C. Lyons at Fri May 28 16:42:10 EDT 2021

NAME

Direction where Langton's ant is looking after n moves: 1 if looking in starting direction, 2 if looking 90° degrees clockwise from starting direction, 3 if looking 90° degrees counterclockwise from starting direction, or 4 if looking in direction opposite to starting direction.

STATUS

approved

editing

#17 by Bruno Berselli at Tue Oct 11 06:25:48 EDT 2016

STATUS

reviewed

approved

#16 by Michel Marcus at Tue Oct 11 05:40:22 EDT 2016

STATUS

proposed

reviewed

#15 by Andrey Zabolotskiy at Tue Oct 11 05:35:40 EDT 2016

STATUS

editing

proposed

#14 by Andrey Zabolotskiy at Tue Oct 11 05:35:33 EDT 2016

EXTENSIONS

More terms from Andrey Zabolotskiy, Oct 11 2016

STATUS

proposed

editing

#13 by Andrey Zabolotskiy at Tue Oct 11 05:34:34 EDT 2016

STATUS

editing

proposed

#12 by Andrey Zabolotskiy at Tue Oct 11 05:34:10 EDT 2016

FORMULA

From Andrey Zabolotskiy, Oct 11 2016: (Start)

Let d(n) = (A255938(n) mod 4). Then:

a(n)=1 if d(n)=0,

a(n)=2 if d(n)=1,

a(n)=4 if d(n)=2,

a(n)=3 if d(n)=3.

(End)

STATUS

proposed

editing