A187660 as a triangular array
| | | | | | | | | | | | 1 |
| | | | | | | | | | | | 1 | | -1 |
| | | | | | | | | | | 1 | | -1 | | -1 |
| | | | | | | | | | 1 | | -2 | | -1 | | 1 |
| | | | | | | | | 1 | | -2 | | -3 | | 1 | | 1 |
| | | | | | | | 1 | | -3 | | -3 | | 4 | | 1 | | -1 |
| | | | | | | 1 | | -3 | | -6 | | 4 | | 5 | | -1 | | -1 |
| | | | | | 1 | | -4 | | -6 | | 10 | | 5 | | -6 | | -1 | | 1 |
| | | | | 1 | | -4 | | -10 | | 10 | | 15 | | -6 | | -7 | | 1 | | 1 |
| | | | 1 | | -5 | | -10 | | 20 | | 15 | | -21 | | -7 | | 8 | | 1 | | -1 |
| | | 1 | | -5 | | -15 | | 20 | | 35 | | -21 | | -28 | | 8 | | 9 | | -1 | | -1 |
| | 1 | | -6 | | -15 | | 35 | | 35 | | -56 | | -28 | | 36 | | 9 | | -10 | | -1 | | 1 |
|
A187660 as a square array
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | -1 | -1 | -2 | -2 | -3 | -3 | -4 | -4 | -5 | -5 | -6
| | -1 | -1 | -3 | -3 | -6 | -6 | -10 | -10 | -15 | -15
| | 1 | 1 | 4 | 4 | 10 | 10 | 20 | 20 | 35
| | 1 | 1 | 5 | 5 | 15 | 15 | 35 | 35
| | -1 | -1 | -6 | -6 | -21 | -21 | -56
| | -1 | -1 | -7 | -7 | -28 | -28
| | 1 | 1 | 8 | 8 | 36
| | 1 | 1 | 9 | 9
| | -1 | -1 | -10
| | -1 | -1
| | 1
|
A187660 as an upper right triangle
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | -1 | -1 | -2 | -2 | -3 | -3 | -4 | -4 | -5 | -5 | -6
| | | -1 | -1 | -3 | -3 | -6 | -6 | -10 | -10 | -15 | -15
| | | | 1 | 1 | 4 | 4 | 10 | 10 | 20 | 20 | 35
| | | | | 1 | 1 | 5 | 5 | 15 | 15 | 35 | 35
| | | | | | -1 | -1 | -6 | -6 | -21 | -21 | -56
| | | | | | | -1 | -1 | -7 | -7 | -28 | -28
| | | | | | | | 1 | 1 | 8 | 8 | 36
| | | | | | | | | 1 | 1 | 9 | 9
| | | | | | | | | | -1 | -1 | -10
| | | | | | | | | | | -1 | -1
| | | | | | | | | | | | 1
|
|
