[        1        1        1        1
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[        0        0        0        0
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[        2        3
         4        6
         6        9
         8       12
        10       15 ]
[        2
         4
         6
         8
        10 ]
[        1        2        3
         2        4        6 ]
[        0        5
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         2        7
         3        8
         4        9 ]
[        0        1        2        3        4
         5        6        7        8        9 ]
[        0
         1
         2
         3
         4 ]
[        0        1        2        3        4 ]
[        0        1        2        3        4 ]
[        0
         1
         2
         3
         4 ]