A158823 as a triangular array
| | | | | | | | | | | | 1 |
| | | | | | | | | | | | 3 | | 1 |
| | | | | | | | | | | 6 | | 2 | | 2 |
| | | | | | | | | | 10 | | 3 | | 4 | | 3 |
| | | | | | | | | 15 | | 4 | | 6 | | 6 | | 4 |
| | | | | | | | 21 | | 5 | | 8 | | 9 | | 8 | | 5 |
| | | | | | | 28 | | 6 | | 10 | | 12 | | 12 | | 10 | | 6 |
| | | | | | 36 | | 7 | | 12 | | 15 | | 16 | | 15 | | 12 | | 7 |
| | | | | 45 | | 8 | | 14 | | 18 | | 20 | | 20 | | 18 | | 14 | | 8 |
| | | | 55 | | 9 | | 16 | | 21 | | 24 | | 25 | | 24 | | 21 | | 16 | | 9 |
| | | 66 | | 10 | | 18 | | 24 | | 28 | | 30 | | 30 | | 28 | | 24 | | 18 | | 10 |
| | 78 | | 11 | | 20 | | 27 | | 32 | | 35 | | 36 | | 35 | | 32 | | 27 | | 20 | | 11 |
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A158823 as a square array
1 | 3 | 6 | 10 | 15 | 21 | 28 | 36 | 45 | 55 | 66 | 78
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11
| 2 | 4 | 6 | 8 | 10 | 12 | 14 | 16 | 18 | 20
| 3 | 6 | 9 | 12 | 15 | 18 | 21 | 24 | 27
| 4 | 8 | 12 | 16 | 20 | 24 | 28 | 32
| 5 | 10 | 15 | 20 | 25 | 30 | 35
| 6 | 12 | 18 | 24 | 30 | 36
| 7 | 14 | 21 | 28 | 35
| 8 | 16 | 24 | 32
| 9 | 18 | 27
| 10 | 20
| 11
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A158823 as an upper right triangle
1 | 3 | 6 | 10 | 15 | 21 | 28 | 36 | 45 | 55 | 66 | 78
| | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11
| | | 2 | 4 | 6 | 8 | 10 | 12 | 14 | 16 | 18 | 20
| | | | 3 | 6 | 9 | 12 | 15 | 18 | 21 | 24 | 27
| | | | | 4 | 8 | 12 | 16 | 20 | 24 | 28 | 32
| | | | | | 5 | 10 | 15 | 20 | 25 | 30 | 35
| | | | | | | 6 | 12 | 18 | 24 | 30 | 36
| | | | | | | | 7 | 14 | 21 | 28 | 35
| | | | | | | | | 8 | 16 | 24 | 32
| | | | | | | | | | 9 | 18 | 27
| | | | | | | | | | | 10 | 20
| | | | | | | | | | | | 11
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