OFFSET
1,2
COMMENTS
Board is numbered with the square spiral:
.
17--16--15--14--13
| |
18 5---4---3 12 .
| | | |
19 6 1---2 11 .
| | |
20 7---8---9--10 .
|
21--22--23--24--25--26
LINKS
Daniël Karssen, Table of n, a(n) for n = 1..10000
Daniël Karssen, Figure showing the first 49 steps of the sequence
CROSSREFS
KEYWORD
nonn
AUTHOR
Daniël Karssen, Jul 15 2018
STATUS
approved