n=4的一些解
..1..8..3.10.11..6..7.14....1..2..9..4..5.12..7.14....1..8..3..4.11..6.13.14
..9..0..2.12..4..5.15.22....0.16.17..3.13.20.15..6....9..0..2.18.19.20..5..7
.17.18.19.26.21.13.23.30....8.24.10.26.11.22.29.30...17.24.25.10.12.22.23.15
.16.32.33.34.29.20.37.38...25.32.18.28.19.36.21.23...16.32.27.28.35.21.31.38
.24.25.35.36.27.28.39.31...33.34.35.27.37.38.39.31...33.34.26.36.37.29.39.30