A055907 as a triangular array
| | | | | | | | | | | | 0 |
| | | | | | | | | | | | 1 | | 1 |
| | | | | | | | | | | 1 | | 2 | | 1 |
| | | | | | | | | | 1 | | 4 | | 4 | | 1 |
| | | | | | | | | 1 | | 6 | | 10 | | 6 | | 1 |
| | | | | | | | 1 | | 9 | | 21 | | 20 | | 8 | | 1 |
| | | | | | | 1 | | 12 | | 39 | | 53 | | 36 | | 10 | | 1 |
| | | | | | 1 | | 16 | | 67 | | 121 | | 128 | | 56 | | 12 | | 1 |
| | | | | 1 | | 20 | | 107 | | 249 | | 388 | | 240 | | 74 | | 14 | | 1 |
| | | | 1 | | 25 | | 163 | | 471 | | 1050 | | 854 | | 331 | | 100 | | 16 | | 1 |
| | | 1 | | 30 | | 238 | | 836 | | 2601 | | 2654 | | 1212 | | 511 | | 130 | | 18 | | 1 |
| | 1 | | 36 | | 337 |
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A055907 as a square array
0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| 1 | 2 | 4 | 6 | 9 | 12 | 16 | 20 | 25 | 30 | 36
| 1 | 4 | 10 | 21 | 39 | 67 | 107 | 163 | 238 | 337
| 1 | 6 | 20 | 53 | 121 | 249 | 471 | 836
| 1 | 8 | 36 | 128 | 388 | 1050 | 2601
| 1 | 10 | 56 | 240 | 854 | 2654
| 1 | 12 | 74 | 331 | 1212
| 1 | 14 | 100 | 511
| 1 | 16 | 130
| 1 | 18
| 1
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A055907 as an upper right triangle
0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 1 | 2 | 4 | 6 | 9 | 12 | 16 | 20 | 25 | 30 | 36
| | | 1 | 4 | 10 | 21 | 39 | 67 | 107 | 163 | 238 | 337
| | | | 1 | 6 | 20 | 53 | 121 | 249 | 471 | 836
| | | | | 1 | 8 | 36 | 128 | 388 | 1050 | 2601
| | | | | | 1 | 10 | 56 | 240 | 854 | 2654
| | | | | | | 1 | 12 | 74 | 331 | 1212
| | | | | | | | 1 | 14 | 100 | 511
| | | | | | | | | 1 | 16 | 130
| | | | | | | | | | 1 | 18
| | | | | | | | | | | 1
| | | | | | | | | | |
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