A207221 as a triangular array
| | | | | | | | | 3 |
| | | | | | | | | 9 | | 9 |
| | | | | | | | 25 | | 81 | | 25 |
| | | | | | | 69 | | 625 | | 625 | | 69 |
| | | | | | 191 | | 4761 | | 12534 | | 4761 | | 191 |
| | | | | 529 | | 36481 | | 247163 | | 247163 | | 36481 | | 529 |
| | | | 1465 | | 279841 | | 4916282 | | 12584703 | | 4916282 | | 279841 | | 1465 |
| | | 4057 | | 2146225 | | 97935886 | | 647820815 | | 647820815 | | 97935886 | | 2146225 | | 4057 |
| | 11235 |
|
A207221 as a square array
3 | 9 | 25 | 69 | 191 | 529 | 1465 | 4057 | 11235
| 9 | 81 | 625 | 4761 | 36481 | 279841 | 2146225
| 25 | 625 | 12534 | 247163 | 4916282 | 97935886
| 69 | 4761 | 247163 | 12584703 | 647820815
| 191 | 36481 | 4916282 | 647820815
| 529 | 279841 | 97935886
| 1465 | 2146225
| 4057
|
A207221 as an upper right triangle
3 | 9 | 25 | 69 | 191 | 529 | 1465 | 4057 | 11235
| | 9 | 81 | 625 | 4761 | 36481 | 279841 | 2146225
| | | 25 | 625 | 12534 | 247163 | 4916282 | 97935886
| | | | 69 | 4761 | 247163 | 12584703 | 647820815
| | | | | 191 | 36481 | 4916282 | 647820815
| | | | | | 529 | 279841 | 97935886
| | | | | | | 1465 | 2146225
| | | | | | | | 4057
| | | | | | | |
|
|