A180051 as a triangular array
| | | | | | | | | | | | 1 |
| | | | | | | | | | | | -1 | | 1 |
| | | | | | | | | | | 0 | | -1 | | 1 |
| | | | | | | | | | -1 | | -1 | | 3 | | 1 |
| | | | | | | | | -1 | | -1 | | 6 | | 3 | | 1 |
| | | | | | | | -2 | | -1 | | 15 | | 7 | | 3 | | 1 |
| | | | | | | -1 | | -1 | | 31 | | 15 | | 7 | | 3 | | 1 |
| | | | | | -2 | | -1 | | 72 | | 34 | | 16 | | 7 | | 3 | | 1 |
| | | | | -2 | | -1 | | 157 | | 73 | | 34 | | 16 | | 7 | | 3 | | 1 |
| | | | -2 | | -1 | | 347 | | 161 | | 75 | | 35 | | 16 | | 7 | | 3 | | 1 |
| | | -1 | | -1 | | 751 | | 349 | | 162 | | 75 | | 35 | | 16 | | 7 | | 3 | | 1 |
| | -2 | | -1 | | 1645 | | 763 | | 354 | | 164 | | 76 | | 35 | | 16 | | 7 |
|
A180051 as a square array
| 1 | -1 | 0 | -1 | -1 | -2 | -1 | -2 | -2 | -2 | -1 | -2
| | 1 | -1 | -1 | -1 | -1 | -1 | -1 | -1 | -1 | -1 | -1
| | 1 | 3 | 6 | 15 | 31 | 72 | 157 | 347 | 751 | 1645
| | 1 | 3 | 7 | 15 | 34 | 73 | 161 | 349 | 763
| | 1 | 3 | 7 | 16 | 34 | 75 | 162 | 354
| | 1 | 3 | 7 | 16 | 35 | 75 | 164
| | 1 | 3 | 7 | 16 | 35 | 76
| | 1 | 3 | 7 | 16 | 35
| | 1 | 3 | 7 | 16
| | 1 | 3 | 7
| | 1
|
A180051 as an upper right triangle
| 1 | -1 | 0 | -1 | -1 | -2 | -1 | -2 | -2 | -2 | -1 | -2
| | 1 | -1 | -1 | -1 | -1 | -1 | -1 | -1 | -1 | -1 | -1
| | | 1 | 3 | 6 | 15 | 31 | 72 | 157 | 347 | 751 | 1645
| | | | 1 | 3 | 7 | 15 | 34 | 73 | 161 | 349 | 763
| | | | | 1 | 3 | 7 | 16 | 34 | 75 | 162 | 354
| | | | | | 1 | 3 | 7 | 16 | 35 | 75 | 164
| | | | | | | 1 | 3 | 7 | 16 | 35 | 76
| | | | | | | | 1 | 3 | 7 | 16 | 35
| | | | | | | | | 1 | 3 | 7 | 16
| | | | | | | | | | 1 | 3 | 7
| | | | | | | | | | | 1
| | | | | | | | | | |
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