A081658 as a triangular array
| | | | | | | | | | | | | 1 |
| | | | | | | | | | | | | 1 | | 0 |
| | | | | | | | | | | | 1 | | 0 | | -1 |
| | | | | | | | | | | 1 | | 0 | | -3 | | 0 |
| | | | | | | | | | 1 | | 0 | | -6 | | 0 | | 5 |
| | | | | | | | | 1 | | 0 | | -10 | | 0 | | 25 | | 0 |
| | | | | | | | 1 | | 0 | | -15 | | 0 | | 75 | | 0 | | -61 |
| | | | | | | 1 | | 0 | | -21 | | 0 | | 175 | | 0 | | -427 | | 0 |
| | | | | | 1 | | 0 | | -28 | | 0 | | 350 | | 0 | | -1708 | | 0 | | 1385 |
| | | | | 1 | | 0 | | -36 | | 0 | | 630 | | 0 | | -5124 | | 0 | | 12465 | | 0 |
| | | | 1 | | 0 | | -45 | | 0 | | 1050 | | 0 | | -12810 | | 0 | | 62325 | | 0 | | -50521 |
| | | 1 | | 0 | | -55 | | 0 | | 1650 | | 0 | | -28182 | | 0 | | 228525 | | 0 | | -555731 | | 0 |
| | 1 | | 0 | | -66 | | 0 | | 2475 | | 0 |
|
A081658 as a square array
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0
| | -1 | -3 | -6 | -10 | -15 | -21 | -28 | -36 | -45 | -55 | -66
| | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0
| | 5 | 25 | 75 | 175 | 350 | 630 | 1050 | 1650 | 2475
| | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0
| | -61 | -427 | -1708 | -5124 | -12810 | -28182
| | 0 | 0 | 0 | 0 | 0
| | 1385 | 12465 | 62325 | 228525
| | 0 | 0 | 0
| | -50521 | -555731
| | 0
|
A081658 as an upper right triangle
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0
| | | -1 | -3 | -6 | -10 | -15 | -21 | -28 | -36 | -45 | -55 | -66
| | | | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0
| | | | | 5 | 25 | 75 | 175 | 350 | 630 | 1050 | 1650 | 2475
| | | | | | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0
| | | | | | | -61 | -427 | -1708 | -5124 | -12810 | -28182
| | | | | | | | 0 | 0 | 0 | 0 | 0
| | | | | | | | | 1385 | 12465 | 62325 | 228525
| | | | | | | | | | 0 | 0 | 0
| | | | | | | | | | | -50521 | -555731
| | | | | | | | | | | | 0
| | | | | | | | | | | |
|
|
