A049290 formatted as a triangular array:
| | | | | | | | 1 | | | | | | | | |
| | | | | | | 1 | | 1 | | | | | | | |
| | | | | | 1 | | 3 | | 1 | | | | | | |
| | | | | 1 | | 7 | | 13 | | 1 | | | | | |
| | | | 1 | | 15 | | 97 | | 71 | | 1 | | | | |
| | | 1 | | 31 | | 625 | | 2143 | | 461 | | 1 | | | |
| | 1 | | 63 | | 3841 | | 54335 | | 68641 | | 3447 | | 1 | | |
| 1 | | 127 | | 23233 | | 1321471 | | 8563601 | | 3011263 | | 29093 | | 1 | |
| 1 | | 255 | | 139777 | | 31817471 | | 1035045121 | | 2228419359 | | 173773153 | | 273343 | | 1 |
A049290 formatted as a square array:
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| 1 | 3 | 7 | 15 | 31 | 63 | 127 | 255 | |
| 1 | 13 | 97 | 625 | 3841 | 23233 | 139777 | | |
| 1 | 71 | 2143 | 54335 | 1321471 | 31817471 | | | |
| 1 | 461 | 68641 | 8563601 | 1035045121 | | | | |
| 1 | 3447 | 3011263 | 2228419359 | | | | | |
| 1 | 29093 | 173773153 | | | | | | |
| 1 | 273343 | | | | | | | |
| 1 | | | | | | | | |
A049290 formatted as an upper right triangle:
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| 1 | 3 | 7 | 15 | 31 | 63 | 127 | 255 |
| | 1 | 13 | 97 | 625 | 3841 | 23233 | 139777 |
| | | 1 | 71 | 2143 | 54335 | 1321471 | 31817471 |
| | | | 1 | 461 | 68641 | 8563601 | 1035045121 |
| | | | | 1 | 3447 | 3011263 | 2228419359 |
| | | | | | 1 | 29093 | 173773153 |
| | | | | | | 1 | 273343 |
| | | | | | | | 1 |
|
