A121412 as a triangular array
| | | | | | | | | | 1 |
| | | | | | | | | | 1 | | 1 |
| | | | | | | | | 3 | | 1 | | 1 |
| | | | | | | | 18 | | 4 | | 1 | | 1 |
| | | | | | | 170 | | 30 | | 5 | | 1 | | 1 |
| | | | | | 2220 | | 335 | | 45 | | 6 | | 1 | | 1 |
| | | | | 37149 | | 4984 | | 581 | | 63 | | 7 | | 1 | | 1 |
| | | | 758814 | | 92652 | | 9730 | | 924 | | 84 | | 8 | | 1 | | 1 |
| | | 18301950 | | 2065146 | | 199692 | | 17226 | | 1380 | | 108 | | 9 | | 1 | | 1 |
| | 508907970 | | 53636520 | | 4843125 | | 387567 | | 28365 | | 1965 | | 135 | | 10 | | 1 | | 1 |
|
A121412 as a square array
| 1 | 1 | 3 | 18 | 170 | 2220 | 37149 | 758814 | 18301950 | 508907970
| | 1 | 1 | 4 | 30 | 335 | 4984 | 92652 | 2065146 | 53636520
| | 1 | 1 | 5 | 45 | 581 | 9730 | 199692 | 4843125
| | 1 | 1 | 6 | 63 | 924 | 17226 | 387567
| | 1 | 1 | 7 | 84 | 1380 | 28365
| | 1 | 1 | 8 | 108 | 1965
| | 1 | 1 | 9 | 135
| | 1 | 1 | 10
| | 1 | 1
| | 1
|
A121412 as an upper right triangle
| 1 | 1 | 3 | 18 | 170 | 2220 | 37149 | 758814 | 18301950 | 508907970
| | 1 | 1 | 4 | 30 | 335 | 4984 | 92652 | 2065146 | 53636520
| | | 1 | 1 | 5 | 45 | 581 | 9730 | 199692 | 4843125
| | | | 1 | 1 | 6 | 63 | 924 | 17226 | 387567
| | | | | 1 | 1 | 7 | 84 | 1380 | 28365
| | | | | | 1 | 1 | 8 | 108 | 1965
| | | | | | | 1 | 1 | 9 | 135
| | | | | | | | 1 | 1 | 10
| | | | | | | | | 1 | 1
| | | | | | | | | | 1
|
|
