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A359572
Squares visited by a princess moving on a spirally numbered board, always to the lowest available unvisited square.
0
1, 3, 6, 4, 2, 5, 8, 11, 9, 12, 14, 20, 22, 19, 7, 13, 21, 31, 43, 57, 30, 32, 15, 18, 16, 10, 23, 29, 33, 41, 44, 42, 45, 24, 27, 25, 17, 34, 28, 46, 40, 60, 35, 38, 36, 26, 47, 39, 61, 53, 77, 48, 51, 49, 37, 62, 52, 78, 68, 96, 54, 76, 70, 94, 56, 58, 55, 59, 71, 74, 72, 75, 89, 92, 90, 93, 109, 73, 91, 111, 133, 157, 110
OFFSET
1,2
COMMENTS
A princess can move like a bishop or a knight.
EXAMPLE
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
CROSSREFS
Sequence in context: A199737 A220397 A021737 * A011307 A243625 A321872
KEYWORD
nonn
AUTHOR
Neal Gersh Tolunsky, Jan 06 2023
STATUS
approved