对于n=6，a（6）=24解是
+---+---+---+---+---+---+
| * | | | | | |
+---+---+---+---+---+---+
| | | * | | | |
+---+---+---+---+---+---+
| | * | | | | |
+---+---+---+---+---+---+,
| | | | | * | |
+---+---+---+---+---+---+
| | | | | | * |
+---+---+---+---+---+---+
| | | | * | | |
+---+---+---+---+---+---+
+---+---+---+---+---+---+
| * | | | | | |
+---+---+---+---+---+---+
| | | * | | | |
+---+---+---+---+---+---+
| | | | | | * |
+---+---+---+---+---+---+、和
| | | | * | | |
+---+---+---+---+---+---+
| | | | | * | |
+---+---+---+---+---+---+
| | * | | | | |
+---+---+---+---+---+---+
+---+---+---+---+---+---+
| * | | | | | |
+---+---+---+---+---+---+
| | * | | | | |
+---+---+---+---+---+---+
| | | | | * | |
+---+---+---+---+---+---+.
| | | | * | | |
+---+---+---+---+---+---+
| | | | | | * |
+---+---+---+---+---+---+
| | | * | | | |
+---+---+---+---+---+---+
