A281871 as a triangular array
| | | | | | | | | | | | | 1 |
| | | | | | | | | | | | | 1 | | 1 |
| | | | | | | | | | | | 1 | | 1 | | 0 |
| | | | | | | | | | | 1 | | 1 | | 1 | | 0 |
| | | | | | | | | | 1 | | 2 | | 1 | | 1 | | 0 |
| | | | | | | | | 1 | | 2 | | 2 | | 2 | | 0 | | 0 |
| | | | | | | | 1 | | 2 | | 3 | | 3 | | 2 | | 1 | | 0 |
| | | | | | | 1 | | 2 | | 4 | | 5 | | 5 | | 2 | | 1 | | 0 |
| | | | | | 1 | | 2 | | 5 | | 8 | | 8 | | 6 | | 3 | | 0 | | 1 |
| | | | | 1 | | 3 | | 6 | | 11 | | 14 | | 13 | | 7 | | 4 | | 1 | | 0 |
| | | | 1 | | 3 | | 7 | | 15 | | 23 | | 24 | | 19 | | 10 | | 3 | | 1 | | 0 |
| | | 1 | | 3 | | 8 | | 20 | | 34 | | 43 | | 39 | | 25 | | 13 | | 3 | | 1 | | 0 |
| | 1 | | 3 | | 9 | | 26 | | 49 | | 71 | | 74 | | 60 | | 34 | | 14 | | 5 | | 0 | | 0 |
|
A281871 as a square array
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 3
| | 0 | 1 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9
| | 0 | 1 | 2 | 3 | 5 | 8 | 11 | 15 | 20 | 26
| | 0 | 0 | 2 | 5 | 8 | 14 | 23 | 34 | 49
| | 0 | 1 | 2 | 6 | 13 | 24 | 43 | 71
| | 0 | 1 | 3 | 7 | 19 | 39 | 74
| | 0 | 0 | 4 | 10 | 25 | 60
| | 1 | 1 | 3 | 13 | 34
| | 0 | 1 | 3 | 14
| | 0 | 1 | 5
| | 0 | 0
| | 0
|
A281871 as an upper right triangle
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 3
| | | 0 | 1 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9
| | | | 0 | 1 | 2 | 3 | 5 | 8 | 11 | 15 | 20 | 26
| | | | | 0 | 0 | 2 | 5 | 8 | 14 | 23 | 34 | 49
| | | | | | 0 | 1 | 2 | 6 | 13 | 24 | 43 | 71
| | | | | | | 0 | 1 | 3 | 7 | 19 | 39 | 74
| | | | | | | | 0 | 0 | 4 | 10 | 25 | 60
| | | | | | | | | 1 | 1 | 3 | 13 | 34
| | | | | | | | | | 0 | 1 | 3 | 14
| | | | | | | | | | | 0 | 1 | 5
| | | | | | | | | | | | 0 | 0
| | | | | | | | | | | | | 0
|
|
