A158815 formatted as a triangular array:
| | | | | | | | 1 | | | | | | | | |
| | | | | | | 1 | | 1 | | | | | | | |
| | | | | | 4 | | 1 | | 1 | | | | | | |
| | | | | 13 | | 5 | | 1 | | 1 | | | | | |
| | | | 46 | | 16 | | 6 | | 1 | | 1 | | | | |
| | | 166 | | 58 | | 19 | | 7 | | 1 | | 1 | | | |
| | 610 | | 211 | | 71 | | 22 | | 8 | | 1 | | 1 | | |
| 2269 | | 781 | | 261 | | 85 | | 25 | | 9 | | 1 | | 1 | |
| 8518 | | 2920 | | 976 | | 316 | | 100 | | 28 | | 10 | | 1 | | 1 |
A158815 formatted as a square array:
| 1 | 1 | 4 | 13 | 46 | 166 | 610 | 2269 | 8518 |
| 1 | 1 | 5 | 16 | 58 | 211 | 781 | 2920 | |
| 1 | 1 | 6 | 19 | 71 | 261 | 976 | | |
| 1 | 1 | 7 | 22 | 85 | 316 | | | |
| 1 | 1 | 8 | 25 | 100 | | | | |
| 1 | 1 | 9 | 28 | | | | | |
| 1 | 1 | 10 | | | | | | |
| 1 | 1 | | | | | | | |
| 1 | | | | | | | | |
A158815 formatted as an upper right triangle:
| 1 | 1 | 4 | 13 | 46 | 166 | 610 | 2269 | 8518 |
| 1 | 1 | 5 | 16 | 58 | 211 | 781 | 2920 |
| | 1 | 1 | 6 | 19 | 71 | 261 | 976 |
| | | 1 | 1 | 7 | 22 | 85 | 316 |
| | | | 1 | 1 | 8 | 25 | 100 |
| | | | | 1 | 1 | 9 | 28 |
| | | | | | 1 | 1 | 10 |
| | | | | | | 1 | 1 |
| | | | | | | | 1 |
|
