A131950 formatted as a triangular array:
| | | | | | | | | 1 | | | | | | | | | |
| | | | | | | | 3 | | 3 | | | | | | | | |
| | | | | | | 5 | | 4 | | 5 | | | | | | | |
| | | | | | 7 | | 6 | | 6 | | 7 | | | | | | |
| | | | | 9 | | 8 | | 10 | | 8 | | 9 | | | | | |
| | | | 11 | | 10 | | 15 | | 15 | | 10 | | 11 | | | | |
| | | 13 | | 12 | | 21 | | 26 | | 21 | | 12 | | 13 | | | |
| | 15 | | 14 | | 28 | | 42 | | 42 | | 28 | | 14 | | 15 | | |
| 17 | | 16 | | 36 | | 64 | | 78 | | 64 | | 36 | | 16 | | 17 | |
| 19 | | 18 | | 45 | | 93 | | 135 | | 135 | | 93 | | 45 | | 18 | | 19 |
A131950 formatted as a square array:
| 1 | 3 | 5 | 7 | 9 | 11 | 13 | 15 | 17 | 19 |
| 3 | 4 | 6 | 8 | 10 | 12 | 14 | 16 | 18 | |
| 5 | 6 | 10 | 15 | 21 | 28 | 36 | 45 | | |
| 7 | 8 | 15 | 26 | 42 | 64 | 93 | | | |
| 9 | 10 | 21 | 42 | 78 | 135 | | | | |
| 11 | 12 | 28 | 64 | 135 | | | | | |
| 13 | 14 | 36 | 93 | | | | | | |
| 15 | 16 | 45 | | | | | | | |
| 17 | 18 | | | | | | | | |
| 19 | | | | | | | | | |
A131950 formatted as an upper right triangle:
| 1 | 3 | 5 | 7 | 9 | 11 | 13 | 15 | 17 | 19 |
| 3 | 4 | 6 | 8 | 10 | 12 | 14 | 16 | 18 |
| | 5 | 6 | 10 | 15 | 21 | 28 | 36 | 45 |
| | | 7 | 8 | 15 | 26 | 42 | 64 | 93 |
| | | | 9 | 10 | 21 | 42 | 78 | 135 |
| | | | | 11 | 12 | 28 | 64 | 135 |
| | | | | | 13 | 14 | 36 | 93 |
| | | | | | | 15 | 16 | 45 |
| | | | | | | | 17 | 18 |
| | | | | | | | | 19 |
|