A221999 as a triangular array
| | | | | | | | | | | | | 2 |
| | | | | | | | | | | | | 2 | | 3 |
| | | | | | | | | | | | 2 | | 3 | | 4 |
| | | | | | | | | | | 2 | | 3 | | 4 | | 6 |
| | | | | | | | | | 2 | | 3 | | 4 | | 6 | | 10 |
| | | | | | | | | 2 | | 3 | | 4 | | 6 | | 10 | | 15 |
| | | | | | | | 2 | | 3 | | 4 | | 6 | | 10 | | 15 | | 22 |
| | | | | | | 2 | | 3 | | 4 | | 6 | | 10 | | 15 | | 22 | | 35 |
| | | | | | 2 | | 3 | | 4 | | 7 | | 10 | | 15 | | 22 | | 36 | | 54 |
| | | | | 2 | | 3 | | 4 | | 7 | | 11 | | 15 | | 24 | | 36 | | 56 | | 81 |
| | | | 2 | | 3 | | 4 | | 7 | | 11 | | 16 | | 25 | | 39 | | 56 | | 84 | | 125 |
| | | 2 | | 3 | | 4 | | 7 | | 11 | | 16 | | 27 | | 40 | | 60 | | 84 | | 133 | | 193 |
| | 2 | | 3 | | 4 | | 7 | | 11 | | 16 | | 27 |
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A221999 as a square array
2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2
| 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3
| 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4
| 6 | 6 | 6 | 6 | 6 | 7 | 7 | 7 | 7 | 7
| 10 | 10 | 10 | 10 | 10 | 11 | 11 | 11 | 11
| 15 | 15 | 15 | 15 | 15 | 16 | 16 | 16
| 22 | 22 | 22 | 24 | 25 | 27 | 27
| 35 | 36 | 36 | 39 | 40
| 54 | 56 | 56 | 60
| 81 | 84 | 84
| 125 | 133
| 193
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A221999 as an upper right triangle
2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2
| | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3
| | | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4
| | | | 6 | 6 | 6 | 6 | 6 | 7 | 7 | 7 | 7 | 7
| | | | | 10 | 10 | 10 | 10 | 10 | 11 | 11 | 11 | 11
| | | | | | 15 | 15 | 15 | 15 | 15 | 16 | 16 | 16
| | | | | | | 22 | 22 | 22 | 24 | 25 | 27 | 27
| | | | | | | | 35 | 36 | 36 | 39 | 40
| | | | | | | | | 54 | 56 | 56 | 60
| | | | | | | | | | 81 | 84 | 84
| | | | | | | | | | | 125 | 133
| | | | | | | | | | | | 193
| | | | | | | | | | | |
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