-------------------------------------------------------------------------------- The 5x5 matrix is: 0 2 8 18 32 3 5 11 21 35 12 14 20 30 44 27 29 35 45 59 48 50 56 66 80 The counterclockwise spiral listing is: 0 3 12 27 48 50 56 66 80 59 44 35 32 18 8 2 5 14 29 35 45 30 21 11 20 -------------------------------------------------------------------------------- The 5x7 matrix is: 0 2 8 18 32 50 72 3 5 11 21 35 53 75 12 14 20 30 44 62 84 27 29 35 45 59 77 99 48 50 56 66 80 98 120 The counterclockwise spiral listing is: 0 3 12 27 48 50 56 66 80 98 120 99 84 75 72 50 32 18 8 2 5 14 29 35 45 59 77 62 53 35 21 11 20 30 44 -------------------------------------------------------------------------------- The 10x7 matrix is: 0 2 8 18 32 50 72 3 5 11 21 35 53 75 12 14 20 30 44 62 84 27 29 35 45 59 77 99 48 50 56 66 80 98 120 75 77 83 93 107 125 147 108 110 116 126 140 158 180 147 149 155 165 179 197 219 192 194 200 210 224 242 264 243 245 251 261 275 293 315 The counterclockwise spiral listing is: 0 3 12 27 48 75 108 147 192 243 245 251 261 275 293 315 264 219 180 147 120 99 84 75 72 50 32 18 8 2 5 14 29 50 77 110 149 194 200 210 224 242 197 158 125 98 77 62 53 35 21 11 20 35 56 83 116 155 165 179 140 107 80 59 44 30 45 66 93 126