Generate the following matrix.

n = 2;
out = [-4    -3    -2    -1     0
       -3    -2    -1     0     1
       -2    -1     0     1     2
       -1     0     1     2     3
        0     1     2     3     4];

n = 5;
out = [-10    -9    -8    -7    -6    -5    -4    -3    -2    -1     0
        -9    -8    -7    -6    -5    -4    -3    -2    -1     0     1
        -8    -7    -6    -5    -4    -3    -2    -1     0     1     2
        -7    -6    -5    -4    -3    -2    -1     0     1     2     3
        -6    -5    -4    -3    -2    -1     0     1     2     3     4
        -5    -4    -3    -2    -1     0     1     2     3     4     5
        -4    -3    -2    -1     0     1     2     3     4     5     6
        -3    -2    -1     0     1     2     3     4     5     6     7
        -2    -1     0     1     2     3     4     5     6     7     8
        -1     0     1     2     3     4     5     6     7     8     9
         0     1     2     3     4     5     6     7     8     9    10];