所有足够小的矩形板m X n上最长非交叉骑士周期的长度,3<=m<=n:
……0…0…4…6…6…6…6…6…10
..........4...6...8..10..12..14..16
..............8..12..14..18..20..22
.................12..18..22..24..28
.....................24..26..32..36
.........................32..36..42
.............................42..50
.................................54
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