A238997 as a triangular array
| | | | | | | | | 3 |
| | | | | | | | | 7 | | 7 |
| | | | | | | | 15 | | 41 | | 15 |
| | | | | | | 31 | | 203 | | 203 | | 31 |
| | | | | | 63 | | 955 | | 2365 | | 955 | | 63 |
| | | | | 127 | | 4393 | | 25601 | | 25601 | | 4393 | | 127 |
| | | | 255 | | 20015 | | 270671 | | 638779 | | 270671 | | 20015 | | 255 |
| | | 511 | | 90841 | | 2827709 | | 15482441 | | 15482441 | | 2827709 | | 90841 | | 511 |
| | 1023 | | 411621 | | 29422487 | | 370847909 |
|
A238997 as a square array
3 | 7 | 15 | 31 | 63 | 127 | 255 | 511 | 1023
| 7 | 41 | 203 | 955 | 4393 | 20015 | 90841 | 411621
| 15 | 203 | 2365 | 25601 | 270671 | 2827709 | 29422487
| 31 | 955 | 25601 | 638779 | 15482441 | 370847909
| 63 | 4393 | 270671 | 15482441
| 127 | 20015 | 2827709
| 255 | 90841
| 511
|
A238997 as an upper right triangle
3 | 7 | 15 | 31 | 63 | 127 | 255 | 511 | 1023
| | 7 | 41 | 203 | 955 | 4393 | 20015 | 90841 | 411621
| | | 15 | 203 | 2365 | 25601 | 270671 | 2827709 | 29422487
| | | | 31 | 955 | 25601 | 638779 | 15482441 | 370847909
| | | | | 63 | 4393 | 270671 | 15482441
| | | | | | 127 | 20015 | 2827709
| | | | | | | 255 | 90841
| | | | | | | | 511
| | | | | | | |
|
|