++++ start N=8
     8    16    7 6 2 6 8 1 4 3
++++ start N=10
    10    18    7 8 2 6 10 1 4 9 5 3
++++ start N=12
    12    21    8 10 2 7 12 1 5 11 4 6 9 3
++++ start N=14
    14    25    10 12 2 9 14 1 4 7 13 5 6 8 11 3
++++ start N=16
    16    27    10 14 2 9 16 1 7 15 5 6 13 8 4 11 12 3
++++ start N=18
    18    30    11 16 2 10 18 1 7 17 5 8 15 6 9 13 4 12 14 3
++++ start N=20
    20    34    13 18 2 12 20 1 5 17 10 7 11 15 8 6 19 9 4 14 16 3
++++ start N=22
    22    36    13 20 2 12 22 1 10 21 5 8 19 9 7 18 11 6 14 16 4 15 17 3
++++ start N=24
    24    39    14 22 2 13 24 1 9 23 6 10 21 7 11 19 8 12 17 5 16 18 4 15 20 3
++++ start N=26
    26    43    16 24 2 15 26 1 6 17 19 7 14 20 9 10 22 11 8 23 12 5 25 13 4 18 21 3
++++ start N=28
    28    45    16 26 2 15 28 1 12 27 6 11 25 9 10 22 13 8 23 14 7 18 20 5 19 21 4 17 24 3
++++ start N=30
    30    48    17 28 2 16 30 1 11 29 7 12 27 8 13 25 9 14 23 10 15 21 6 20 22 5 19 24 4 18 26 3
++++ start N=32
++++ start N=26
++++ start N=28
    28    46    26 2 16 28 1 3 18 22 5 19 20 7 17 21 8 14 23 9 12 24 10 11 25 6 13 27 4 15
++++ start N=30
++++ start N=26
++++ start N=26
    26    42    25 3 13 26 1 14 23 2 17 20 4 18 16 7 19 15 6 21 9 11 22 8 10 24 5 12
++++ start N=32