t = | 0 | 1 | 2 | 3 | 4 | |
r = 2 | s = 0 | 2 | 4 | 9 | 16 | 29 |
r = 2 | s = 1 | 4 | 11 | 26 | 52 | 98 |
r = 2 | s = 2 | 9 | 26 | 66 | 137 | 269 |
r = 2 | s = 3 | 16 | 52 | 137 | 300 | 606 |
r = 2 | s = 4 | 29 | 98 | 269 | 606 | 1259 |