A258309 as a triangular array
| | | | | | | | | | | 1 |
| | | | | | | | | | | 1 | | 1 |
| | | | | | | | | | 1 | | 1 | | 2 |
| | | | | | | | | 1 | | 1 | | 3 | | 4 |
| | | | | | | | 1 | | 1 | | 4 | | 7 | | 9 |
| | | | | | | 1 | | 1 | | 5 | | 10 | | 23 | | 21 |
| | | | | | 1 | | 1 | | 6 | | 13 | | 43 | | 71 | | 51 |
| | | | | 1 | | 1 | | 7 | | 16 | | 69 | | 151 | | 255 | | 127 |
| | | | 1 | | 1 | | 8 | | 19 | | 101 | | 261 | | 703 | | 911 | | 323 |
| | | 1 | | 1 | | 9 | | 22 | | 139 | | 401 | | 1485 | | 2983 | | 3535 | | 835 |
| | 1 | | 1 | | 10 | | 25 | | 183 | | 571 | | 2691 | | 6973 | | 14977 | | 13903 | | 2188 |
|
A258309 as a square array
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10
| | 4 | 7 | 10 | 13 | 16 | 19 | 22 | 25
| | 9 | 23 | 43 | 69 | 101 | 139 | 183
| | 21 | 71 | 151 | 261 | 401 | 571
| | 51 | 255 | 703 | 1485 | 2691
| | 127 | 911 | 2983 | 6973
| | 323 | 3535 | 14977
| | 835 | 13903
| | 2188
|
A258309 as an upper right triangle
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10
| | | | 4 | 7 | 10 | 13 | 16 | 19 | 22 | 25
| | | | | 9 | 23 | 43 | 69 | 101 | 139 | 183
| | | | | | 21 | 71 | 151 | 261 | 401 | 571
| | | | | | | 51 | 255 | 703 | 1485 | 2691
| | | | | | | | 127 | 911 | 2983 | 6973
| | | | | | | | | 323 | 3535 | 14977
| | | | | | | | | | 835 | 13903
| | | | | | | | | | | 2188
|
|
