A237391 as a triangular array
| | | | | | | | 81 |
| | | | | | | | 434 | | 434 |
| | | | | | | 2336 | | 3240 | | 2336 |
| | | | | | 12624 | | 24340 | | 24340 | | 12624 |
| | | | | 68064 | | 183764 | | 255937 | | 183764 | | 68064 |
| | | | 366568 | | 1379886 | | 2712486 | | 2712486 | | 1379886 | | 366568 |
| | | 1976940 | | 10406596 | | 28732972 | | 41204198 | | 28732972 | | 10406596 | | 1976940 |
| | 10657560 | | 78612538 |
|
A237391 as a square array
81 | 434 | 2336 | 12624 | 68064 | 366568 | 1976940 | 10657560
| 434 | 3240 | 24340 | 183764 | 1379886 | 10406596 | 78612538
| 2336 | 24340 | 255937 | 2712486 | 28732972
| 12624 | 183764 | 2712486 | 41204198
| 68064 | 1379886 | 28732972
| 366568 | 10406596
| 1976940
|
A237391 as an upper right triangle
81 | 434 | 2336 | 12624 | 68064 | 366568 | 1976940 | 10657560
| | 434 | 3240 | 24340 | 183764 | 1379886 | 10406596 | 78612538
| | | 2336 | 24340 | 255937 | 2712486 | 28732972
| | | | 12624 | 183764 | 2712486 | 41204198
| | | | | 68064 | 1379886 | 28732972
| | | | | | 366568 | 10406596
| | | | | | | 1976940
| | | | | | |
|
|