A131899 as a triangular array
| | | | | | | | | | 1 |
| | | | | | | | | | 2 | | 3 |
| | | | | | | | | 3 | | 2 | | 5 |
| | | | | | | | 4 | | 2 | | 3 | | 7 |
| | | | | | | 5 | | 2 | | 3 | | 4 | | 9 |
| | | | | | 6 | | 2 | | 3 | | 4 | | 5 | | 11 |
| | | | | 7 | | 2 | | 3 | | 4 | | 5 | | 6 | | 13 |
| | | | 8 | | 2 | | 3 | | 4 | | 5 | | 6 | | 7 | | 15 |
| | | 9 | | 2 | | 3 | | 4 | | 5 | | 6 | | 7 | | 8 | | 17 |
| | 10 | | 2 | | 3 | | 4 | | 5 | | 6 | | 7 | | 8 | | 9 | | 19 |
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A131899 as a square array
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10
| 3 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2
| 5 | 3 | 3 | 3 | 3 | 3 | 3 | 3
| 7 | 4 | 4 | 4 | 4 | 4 | 4
| 9 | 5 | 5 | 5 | 5 | 5
| 11 | 6 | 6 | 6 | 6
| 13 | 7 | 7 | 7
| 15 | 8 | 8
| 17 | 9
| 19
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A131899 as an upper right triangle
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10
| | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2
| | | 5 | 3 | 3 | 3 | 3 | 3 | 3 | 3
| | | | 7 | 4 | 4 | 4 | 4 | 4 | 4
| | | | | 9 | 5 | 5 | 5 | 5 | 5
| | | | | | 11 | 6 | 6 | 6 | 6
| | | | | | | 13 | 7 | 7 | 7
| | | | | | | | 15 | 8 | 8
| | | | | | | | | 17 | 9
| | | | | | | | | | 19
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