A158909 as a triangular array
| | | | | | | | | | | 1 |
| | | | | | | | | | | 1 | | 1 |
| | | | | | | | | | 2 | | 3 | | 1 |
| | | | | | | | | 2 | | 7 | | 5 | | 1 |
| | | | | | | | 3 | | 13 | | 16 | | 7 | | 1 |
| | | | | | | 3 | | 22 | | 40 | | 29 | | 9 | | 1 |
| | | | | | 4 | | 34 | | 86 | | 91 | | 46 | | 11 | | 1 |
| | | | | 4 | | 50 | | 166 | | 239 | | 174 | | 67 | | 13 | | 1 |
| | | | 5 | | 70 | | 296 | | 553 | | 541 | | 297 | | 92 | | 15 | | 1 |
| | | 5 | | 95 | | 496 | | 1163 | | 1461 | | 1068 | | 468 | | 121 | | 17 | | 1 |
| | 6 | | 125 | | 791 | | 2269 | | 3544 | | 3300 | | 1912 | | 695 | | 154 | | 19 | | 1 |
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A158909 as a square array
| 1 | 1 | 2 | 2 | 3 | 3 | 4 | 4 | 5 | 5 | 6
| | 1 | 3 | 7 | 13 | 22 | 34 | 50 | 70 | 95 | 125
| | 1 | 5 | 16 | 40 | 86 | 166 | 296 | 496 | 791
| | 1 | 7 | 29 | 91 | 239 | 553 | 1163 | 2269
| | 1 | 9 | 46 | 174 | 541 | 1461 | 3544
| | 1 | 11 | 67 | 297 | 1068 | 3300
| | 1 | 13 | 92 | 468 | 1912
| | 1 | 15 | 121 | 695
| | 1 | 17 | 154
| | 1 | 19
| | 1
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A158909 as an upper right triangle
| 1 | 1 | 2 | 2 | 3 | 3 | 4 | 4 | 5 | 5 | 6
| | 1 | 3 | 7 | 13 | 22 | 34 | 50 | 70 | 95 | 125
| | | 1 | 5 | 16 | 40 | 86 | 166 | 296 | 496 | 791
| | | | 1 | 7 | 29 | 91 | 239 | 553 | 1163 | 2269
| | | | | 1 | 9 | 46 | 174 | 541 | 1461 | 3544
| | | | | | 1 | 11 | 67 | 297 | 1068 | 3300
| | | | | | | 1 | 13 | 92 | 468 | 1912
| | | | | | | | 1 | 15 | 121 | 695
| | | | | | | | | 1 | 17 | 154
| | | | | | | | | | 1 | 19
| | | | | | | | | | | 1
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