--------------------------------------------------------------------------------
The 5x5 matrix is:
  0   4  16  36  64 
  1   5  17  37  65 
  4   8  20  40  68 
  9  13  25  45  73 
 16  20  32  52  80 
The clockwise spiral listing is:
  0   4  16  36  64  65  68  73  80  52  32  20  16   9   4   1   5  17  37  40 
 45  25  13   8  20 
--------------------------------------------------------------------------------
The 5x7 matrix is:
  0   4  16  36  64 100 144 
  1   5  17  37  65 101 145 
  4   8  20  40  68 104 148 
  9  13  25  45  73 109 153 
 16  20  32  52  80 116 160 
The clockwise spiral listing is:
  0   4  16  36  64 100 144 145 148 153 160 116  80  52  32  20  16   9   4   1 
  5  17  37  65 101 104 109  73  45  25  13   8  20  40  68 
--------------------------------------------------------------------------------
The 10x7 matrix is:
  0   4  16  36  64 100 144 
  1   5  17  37  65 101 145 
  4   8  20  40  68 104 148 
  9  13  25  45  73 109 153 
 16  20  32  52  80 116 160 
 25  29  41  61  89 125 169 
 36  40  52  72 100 136 180 
 49  53  65  85 113 149 193 
 64  68  80 100 128 164 208 
 81  85  97 117 145 181 225 
The clockwise spiral listing is:
  0   4  16  36  64 100 144 145 148 153 160 169 180 193 208 225 181 145 117  97 
 85  81  64  49  36  25  16   9   4   1   5  17  37  65 101 104 109 116 125 136 
149 164 128 100  80  68  53  40  29  20  13   8  20  40  68  73  80  89 100 113 
 85  65  52  41  32  25  45  52  61  72