A121207 as a triangular array
| | | | | | | | | | | 1 |
| | | | | | | | | | | 1 | | 1 |
| | | | | | | | | | 1 | | 1 | | 2 |
| | | | | | | | | 1 | | 1 | | 3 | | 5 |
| | | | | | | | 1 | | 1 | | 4 | | 9 | | 15 |
| | | | | | | 1 | | 1 | | 5 | | 14 | | 31 | | 52 |
| | | | | | 1 | | 1 | | 6 | | 20 | | 54 | | 121 | | 203 |
| | | | | 1 | | 1 | | 7 | | 27 | | 85 | | 233 | | 523 | | 877 |
| | | | 1 | | 1 | | 8 | | 35 | | 125 | | 400 | | 1101 | | 2469 | | 4140 |
| | | 1 | | 1 | | 9 | | 44 | | 175 | | 635 | | 2046 | | 5625 | | 12611 | | 21147 |
| | 1 | | 1 | | 10 | | 54 | | 236 | | 952 | | 3488 | | 11226 | | 30846 | | 69161 | | 115975 |
|
A121207 as a square array
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10
| | 5 | 9 | 14 | 20 | 27 | 35 | 44 | 54
| | 15 | 31 | 54 | 85 | 125 | 175 | 236
| | 52 | 121 | 233 | 400 | 635 | 952
| | 203 | 523 | 1101 | 2046 | 3488
| | 877 | 2469 | 5625 | 11226
| | 4140 | 12611 | 30846
| | 21147 | 69161
| | 115975
|
A121207 as an upper right triangle
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10
| | | | 5 | 9 | 14 | 20 | 27 | 35 | 44 | 54
| | | | | 15 | 31 | 54 | 85 | 125 | 175 | 236
| | | | | | 52 | 121 | 233 | 400 | 635 | 952
| | | | | | | 203 | 523 | 1101 | 2046 | 3488
| | | | | | | | 877 | 2469 | 5625 | 11226
| | | | | | | | | 4140 | 12611 | 30846
| | | | | | | | | | 21147 | 69161
| | | | | | | | | | | 115975
|
|
