OFFSET
1,1
COMMENTS
a(n)-n is an indicator of whether there is still space between the covered grid points and the best possible placed square towards its perimeter. a(n)-n <= 0 for n = 3, 5, 10, 15, 17, 20, 22, ... . A comparison with the linked illustrations from A354706 shows that in all these cases the covering square is rotated by Pi/4 and only slightly exceeds diagonal rows of grid points on all its edges.
LINKS
CROSSREFS
KEYWORD
nonn,hard,more
AUTHOR
Hugo Pfoertner, Jun 21 2022
STATUS
approved