A166973 as a triangular array
| | | | | | | | | | 1 |
| | | | | | | | | | 1 | | 1 |
| | | | | | | | | 1 | | 7 | | 1 |
| | | | | | | | 1 | | 43 | | 18 | | 1 |
| | | | | | | 1 | | 259 | | 241 | | 34 | | 1 |
| | | | | | 1 | | 1555 | | 2910 | | 785 | | 55 | | 1 |
| | | | | 1 | | 9331 | | 33565 | | 15470 | | 1940 | | 81 | | 1 |
| | | | 1 | | 55987 | | 378546 | | 281085 | | 56210 | | 4046 | | 112 | | 1 |
| | | 1 | | 335923 | | 4219993 | | 4875906 | | 1461495 | | 161406 | | 7518 | | 148 | | 1 |
| | 1 | | 2015539 | | 46755846 | | 82234489 |
|
A166973 as a square array
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 1 | 7 | 43 | 259 | 1555 | 9331 | 55987 | 335923 | 2015539
| | 1 | 18 | 241 | 2910 | 33565 | 378546 | 4219993 | 46755846
| | 1 | 34 | 785 | 15470 | 281085 | 4875906 | 82234489
| | 1 | 55 | 1940 | 56210 | 1461495
| | 1 | 81 | 4046 | 161406
| | 1 | 112 | 7518
| | 1 | 148
| | 1
|
A166973 as an upper right triangle
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 1 | 7 | 43 | 259 | 1555 | 9331 | 55987 | 335923 | 2015539
| | | 1 | 18 | 241 | 2910 | 33565 | 378546 | 4219993 | 46755846
| | | | 1 | 34 | 785 | 15470 | 281085 | 4875906 | 82234489
| | | | | 1 | 55 | 1940 | 56210 | 1461495
| | | | | | 1 | 81 | 4046 | 161406
| | | | | | | 1 | 112 | 7518
| | | | | | | | 1 | 148
| | | | | | | | | 1
| | | | | | | | |
|
|
