A131307 as a triangular array
| | | | | | | | | | 1 |
| | | | | | | | | | 2 | | 3 |
| | | | | | | | | 3 | | 2 | | 5 |
| | | | | | | | 4 | | 5 | | 2 | | 7 |
| | | | | | | 5 | | 4 | | 7 | | 2 | | 9 |
| | | | | | 6 | | 7 | | 4 | | 9 | | 2 | | 11 |
| | | | | 7 | | 6 | | 9 | | 4 | | 11 | | 2 | | 13 |
| | | | 8 | | 9 | | 6 | | 11 | | 4 | | 13 | | 2 | | 15 |
| | | 9 | | 8 | | 11 | | 6 | | 13 | | 4 | | 15 | | 2 | | 17 |
| | 10 | | 11 | | 8 | | 13 | | 6 | | 15 | | 4 | | 17 | | 2 | | 19 |
|
A131307 as a square array
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10
| | 3 | 2 | 5 | 4 | 7 | 6 | 9 | 8 | 11
| | 5 | 2 | 7 | 4 | 9 | 6 | 11 | 8
| | 7 | 2 | 9 | 4 | 11 | 6 | 13
| | 9 | 2 | 11 | 4 | 13 | 6
| | 11 | 2 | 13 | 4 | 15
| | 13 | 2 | 15 | 4
| | 15 | 2 | 17
| | 17 | 2
| | 19
|
A131307 as an upper right triangle
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10
| | 3 | 2 | 5 | 4 | 7 | 6 | 9 | 8 | 11
| | | 5 | 2 | 7 | 4 | 9 | 6 | 11 | 8
| | | | 7 | 2 | 9 | 4 | 11 | 6 | 13
| | | | | 9 | 2 | 11 | 4 | 13 | 6
| | | | | | 11 | 2 | 13 | 4 | 15
| | | | | | | 13 | 2 | 15 | 4
| | | | | | | | 15 | 2 | 17
| | | | | | | | | 17 | 2
| | | | | | | | | | 19
|
|
