A154980 as a triangular array
| | | | | | | | | | 1 |
| | | | | | | | | | 1 | | 1 |
| | | | | | | | | 1 | | 6 | | 1 |
| | | | | | | | 1 | | 15 | | 15 | | 1 |
| | | | | | | 1 | | 32 | | 126 | | 32 | | 1 |
| | | | | | 1 | | 65 | | 638 | | 638 | | 65 | | 1 |
| | | | | 1 | | 130 | | 2751 | | 9340 | | 2751 | | 130 | | 1 |
| | | | 1 | | 259 | | 11201 | | 93755 | | 93755 | | 11201 | | 259 | | 1 |
| | | 1 | | 516 | | 44740 | | 809212 | | 2578550 | | 809212 | | 44740 | | 516 | | 1 |
| | 1 | | 1029 | | 177864 | | 6588864 | | 51390322 | | 51390322 | | 6588864 | | 177864 | | 1029 | | 1 |
|
A154980 as a square array
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 1 | 6 | 15 | 32 | 65 | 130 | 259 | 516 | 1029
| | 1 | 15 | 126 | 638 | 2751 | 11201 | 44740 | 177864
| | 1 | 32 | 638 | 9340 | 93755 | 809212 | 6588864
| | 1 | 65 | 2751 | 93755 | 2578550 | 51390322
| | 1 | 130 | 11201 | 809212 | 51390322
| | 1 | 259 | 44740 | 6588864
| | 1 | 516 | 177864
| | 1 | 1029
| | 1
|
A154980 as an upper right triangle
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 1 | 6 | 15 | 32 | 65 | 130 | 259 | 516 | 1029
| | | 1 | 15 | 126 | 638 | 2751 | 11201 | 44740 | 177864
| | | | 1 | 32 | 638 | 9340 | 93755 | 809212 | 6588864
| | | | | 1 | 65 | 2751 | 93755 | 2578550 | 51390322
| | | | | | 1 | 130 | 11201 | 809212 | 51390322
| | | | | | | 1 | 259 | 44740 | 6588864
| | | | | | | | 1 | 516 | 177864
| | | | | | | | | 1 | 1029
| | | | | | | | | | 1
|
|
