A156290 formatted as a triangular array:
| | | | | | | | 1 | | | | | | | | |
| | | | | | | -4 | | 1 | | | | | | | |
| | | | | | 15 | | -6 | | 1 | | | | | | |
| | | | | -56 | | 28 | | -8 | | 1 | | | | | |
| | | | 210 | | -120 | | 45 | | -10 | | 1 | | | | |
| | | -792 | | 495 | | -220 | | 66 | | -12 | | 1 | | | |
| | 3003 | | -2002 | | 1001 | | -364 | | 91 | | -14 | | 1 | | |
| -11440 | | 8008 | | -4368 | | 1820 | | -560 | | 120 | | -16 | | 1 | |
| 43758 | | -31824 | | 18564 | | -8568 | | 3060 | | -816 | | 153 | | -18 | | 1 |
A156290 formatted as a square array:
| 1 | -4 | 15 | -56 | 210 | -792 | 3003 | -11440 | 43758 |
| 1 | -6 | 28 | -120 | 495 | -2002 | 8008 | -31824 | |
| 1 | -8 | 45 | -220 | 1001 | -4368 | 18564 | | |
| 1 | -10 | 66 | -364 | 1820 | -8568 | | | |
| 1 | -12 | 91 | -560 | 3060 | | | | |
| 1 | -14 | 120 | -816 | | | | | |
| 1 | -16 | 153 | | | | | | |
| 1 | -18 | | | | | | | |
| 1 | | | | | | | | |
A156290 formatted as an upper right triangle:
| 1 | -4 | 15 | -56 | 210 | -792 | 3003 | -11440 | 43758 |
| 1 | -6 | 28 | -120 | 495 | -2002 | 8008 | -31824 |
| | 1 | -8 | 45 | -220 | 1001 | -4368 | 18564 |
| | | 1 | -10 | 66 | -364 | 1820 | -8568 |
| | | | 1 | -12 | 91 | -560 | 3060 |
| | | | | 1 | -14 | 120 | -816 |
| | | | | | 1 | -16 | 153 |
| | | | | | | 1 | -18 |
| | | | | | | | 1 |
|
