A055818 as a triangular array
| | | | | | | | | | | 1 |
| | | | | | | | | | | 1 | | 1 |
| | | | | | | | | | 1 | | 2 | | 1 |
| | | | | | | | | 1 | | 5 | | 3 | | 1 |
| | | | | | | | 1 | | 11 | | 9 | | 4 | | 1 |
| | | | | | | 1 | | 23 | | 24 | | 14 | | 5 | | 1 |
| | | | | | 1 | | 47 | | 60 | | 43 | | 20 | | 6 | | 1 |
| | | | | 1 | | 95 | | 144 | | 122 | | 69 | | 27 | | 7 | | 1 |
| | | | 1 | | 191 | | 336 | | 328 | | 217 | | 103 | | 35 | | 8 | | 1 |
| | | 1 | | 383 | | 768 | | 848 | | 640 | | 354 | | 146 | | 44 | | 9 | | 1 |
| | 1 | | 767 | | 1728 | | 2128 | | 1800 | | 1131 | | 543 | | 199 | | 54 | | 10 | | 1 |
|
A055818 as a square array
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 1 | 2 | 5 | 11 | 23 | 47 | 95 | 191 | 383 | 767
| | 1 | 3 | 9 | 24 | 60 | 144 | 336 | 768 | 1728
| | 1 | 4 | 14 | 43 | 122 | 328 | 848 | 2128
| | 1 | 5 | 20 | 69 | 217 | 640 | 1800
| | 1 | 6 | 27 | 103 | 354 | 1131
| | 1 | 7 | 35 | 146 | 543
| | 1 | 8 | 44 | 199
| | 1 | 9 | 54
| | 1 | 10
| | 1
|
A055818 as an upper right triangle
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 1 | 2 | 5 | 11 | 23 | 47 | 95 | 191 | 383 | 767
| | | 1 | 3 | 9 | 24 | 60 | 144 | 336 | 768 | 1728
| | | | 1 | 4 | 14 | 43 | 122 | 328 | 848 | 2128
| | | | | 1 | 5 | 20 | 69 | 217 | 640 | 1800
| | | | | | 1 | 6 | 27 | 103 | 354 | 1131
| | | | | | | 1 | 7 | 35 | 146 | 543
| | | | | | | | 1 | 8 | 44 | 199
| | | | | | | | | 1 | 9 | 54
| | | | | | | | | | 1 | 10
| | | | | | | | | | | 1
|
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