A015718 as a triangular array
| | | | | | | | | | | | | 0 |
| | | | | | | | | | | | | 1 | | 0 |
| | | | | | | | | | | | 1 | | 1 | | 1 |
| | | | | | | | | | | 1 | | 2 | | 1 | | 1 |
| | | | | | | | | | 2 | | 2 | | 2 | | 2 | | 2 |
| | | | | | | | | 2 | | 2 | | 3 | | 3 | | 3 | | 3 |
| | | | | | | | 3 | | 3 | | 4 | | 3 | | 4 | | 4 | | 4 |
| | | | | | | 3 | | 4 | | 4 | | 5 | | 4 | | 5 | | 5 | | 5 |
| | | | | | 5 | | 5 | | 5 | | 6 | | 6 | | 6 | | 7 | | 7 | | 7 |
| | | | | 5 | | 6 | | 6 | | 7 | | 8 | | 8 | | 8 | | 9 | | 9 | | 9 |
| | | | 7 | | 7 | | 8 | | 9 | | 9 | | 9 | | 10 | | 10 | | 11 | | 11 | | 11 |
| | | 8 | | 9 | | 10 | | 10 | | 11 | | 12 | | 12 | | 13 | | 13 | | 14 | | 14 | | 14 |
| | 10 | | 11 | | 12 |
|
A015718 as a square array
| 0 | 1 | 1 | 1 | 2 | 2 | 3 | 3 | 5 | 5 | 7 | 8 | 10
| | 0 | 1 | 2 | 2 | 2 | 3 | 4 | 5 | 6 | 7 | 9 | 11
| | 1 | 1 | 2 | 3 | 4 | 4 | 5 | 6 | 8 | 10 | 12
| | 1 | 2 | 3 | 3 | 5 | 6 | 7 | 9 | 10
| | 2 | 3 | 4 | 4 | 6 | 8 | 9 | 11
| | 3 | 4 | 5 | 6 | 8 | 9 | 12
| | 4 | 5 | 7 | 8 | 10 | 12
| | 5 | 7 | 9 | 10 | 13
| | 7 | 9 | 11 | 13
| | 9 | 11 | 14
| | 11 | 14
| | 14
|
A015718 as an upper right triangle
| 0 | 1 | 1 | 1 | 2 | 2 | 3 | 3 | 5 | 5 | 7 | 8 | 10
| | 0 | 1 | 2 | 2 | 2 | 3 | 4 | 5 | 6 | 7 | 9 | 11
| | | 1 | 1 | 2 | 3 | 4 | 4 | 5 | 6 | 8 | 10 | 12
| | | | 1 | 2 | 3 | 3 | 5 | 6 | 7 | 9 | 10
| | | | | 2 | 3 | 4 | 4 | 6 | 8 | 9 | 11
| | | | | | 3 | 4 | 5 | 6 | 8 | 9 | 12
| | | | | | | 4 | 5 | 7 | 8 | 10 | 12
| | | | | | | | 5 | 7 | 9 | 10 | 13
| | | | | | | | | 7 | 9 | 11 | 13
| | | | | | | | | | 9 | 11 | 14
| | | | | | | | | | | 11 | 14
| | | | | | | | | | | | 14
| | | | | | | | | | | |
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