OFFSET
0,2
COMMENTS
Board is numbered with the square spiral:
.
16--15--14--13--12
| |
17 4---3---2 11 .
| | | |
18 5 0---1 10 .
| | |
19 6---7---8---9 .
|
20--21--22--23--24--25
.
The sequence is finite: at step 4633, square 4697 is visited, after which there are no unvisited squares within one move.
LINKS
Daniël Karssen, Table of n, a(n) for n = 0..4633
Daniël Karssen, Figure showing the first 51 steps of the sequence
Daniël Karssen, Figure showing the complete sequence
FORMULA
a(n) = A317471(n+1) - 1.
CROSSREFS
KEYWORD
nonn,fini,full
AUTHOR
Daniël Karssen, Jul 29 2018
STATUS
approved