A321620 as a triangular array
| | | | | | | | | | | | 1 |
| | | | | | | | | | | | 1 | | 1 |
| | | | | | | | | | | 0 | | 1 | | 1 |
| | | | | | | | | | 1 | | 1 | | 1 | | 1 |
| | | | | | | | | 1 | | 3 | | 2 | | 1 | | 1 |
| | | | | | | | 3 | | 5 | | 5 | | 3 | | 1 | | 1 |
| | | | | | | 6 | | 13 | | 10 | | 7 | | 4 | | 1 | | 1 |
| | | | | | 15 | | 29 | | 26 | | 16 | | 9 | | 5 | | 1 | | 1 |
| | | | | 36 | | 73 | | 61 | | 42 | | 23 | | 11 | | 6 | | 1 | | 1 |
| | | | 91 | | 181 | | 157 | | 103 | | 61 | | 31 | | 13 | | 7 | | 1 | | 1 |
| | | 232 | | 465 | | 398 | | 271 | | 156 | | 83 | | 40 | | 15 | | 8 | | 1 | | 1 |
| | 603 | | 1205 | | 1040 | | 702 | | 419 | | 221 | | 108 | | 50 | | 17 | | 9 | | 1 | | 1 |
|
A321620 as a square array
| 1 | 1 | 0 | 1 | 1 | 3 | 6 | 15 | 36 | 91 | 232 | 603
| | 1 | 1 | 1 | 3 | 5 | 13 | 29 | 73 | 181 | 465 | 1205
| | 1 | 1 | 2 | 5 | 10 | 26 | 61 | 157 | 398 | 1040
| | 1 | 1 | 3 | 7 | 16 | 42 | 103 | 271 | 702
| | 1 | 1 | 4 | 9 | 23 | 61 | 156 | 419
| | 1 | 1 | 5 | 11 | 31 | 83 | 221
| | 1 | 1 | 6 | 13 | 40 | 108
| | 1 | 1 | 7 | 15 | 50
| | 1 | 1 | 8 | 17
| | 1 | 1 | 9
| | 1 | 1
| | 1
|
A321620 as an upper right triangle
| 1 | 1 | 0 | 1 | 1 | 3 | 6 | 15 | 36 | 91 | 232 | 603
| | 1 | 1 | 1 | 3 | 5 | 13 | 29 | 73 | 181 | 465 | 1205
| | | 1 | 1 | 2 | 5 | 10 | 26 | 61 | 157 | 398 | 1040
| | | | 1 | 1 | 3 | 7 | 16 | 42 | 103 | 271 | 702
| | | | | 1 | 1 | 4 | 9 | 23 | 61 | 156 | 419
| | | | | | 1 | 1 | 5 | 11 | 31 | 83 | 221
| | | | | | | 1 | 1 | 6 | 13 | 40 | 108
| | | | | | | | 1 | 1 | 7 | 15 | 50
| | | | | | | | | 1 | 1 | 8 | 17
| | | | | | | | | | 1 | 1 | 9
| | | | | | | | | | | 1 | 1
| | | | | | | | | | | | 1
|
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