A081576 as a triangular array
| | | | | | | | | | | 0 |
| | | | | | | | | | | 0 | | 1 |
| | | | | | | | | | 0 | | 1 | | 1 |
| | | | | | | | | 0 | | 1 | | 3 | | 2 |
| | | | | | | | 0 | | 1 | | 5 | | 8 | | 3 |
| | | | | | | 0 | | 1 | | 7 | | 20 | | 21 | | 5 |
| | | | | | 0 | | 1 | | 9 | | 38 | | 75 | | 55 | | 8 |
| | | | | 0 | | 1 | | 11 | | 62 | | 189 | | 275 | | 144 | | 13 |
| | | | 0 | | 1 | | 13 | | 92 | | 387 | | 905 | | 1000 | | 377 | | 21 |
| | | 0 | | 1 | | 15 | | 128 | | 693 | | 2305 | | 4256 | | 3625 | | 987 | | 34 |
| | 0 | | 1 | | 17 | | 170 | | 1131 | | 4955 | | 13392 | | 19837 | | 13125 | | 2584 | | 55 |
|
A081576 as a square array
0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| 1 | 3 | 5 | 7 | 9 | 11 | 13 | 15 | 17
| 2 | 8 | 20 | 38 | 62 | 92 | 128 | 170
| 3 | 21 | 75 | 189 | 387 | 693 | 1131
| 5 | 55 | 275 | 905 | 2305 | 4955
| 8 | 144 | 1000 | 4256 | 13392
| 13 | 377 | 3625 | 19837
| 21 | 987 | 13125
| 34 | 2584
| 55
|
A081576 as an upper right triangle
0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0
| | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | | 1 | 3 | 5 | 7 | 9 | 11 | 13 | 15 | 17
| | | | 2 | 8 | 20 | 38 | 62 | 92 | 128 | 170
| | | | | 3 | 21 | 75 | 189 | 387 | 693 | 1131
| | | | | | 5 | 55 | 275 | 905 | 2305 | 4955
| | | | | | | 8 | 144 | 1000 | 4256 | 13392
| | | | | | | | 13 | 377 | 3625 | 19837
| | | | | | | | | 21 | 987 | 13125
| | | | | | | | | | 34 | 2584
| | | | | | | | | | | 55
|
|