A278657 as a triangular array
| | | | | | | | | | | 1 |
| | | | | | | | | | | 1 | | 1 |
| | | | | | | | | | 1 | | 1 | | 1 |
| | | | | | | | | 1 | | 1 | | 1 | | 1 |
| | | | | | | | 1 | | 1 | | 1 | | 1 | | 1 |
| | | | | | | 1 | | 1 | | 7 | | 7 | | 1 | | 1 |
| | | | | | 1 | | 2 | | 25 | | 50 | | 25 | | 2 | | 1 |
| | | | | 1 | | 3 | | 50 | | 311 | | 311 | | 50 | | 3 | | 1 |
| | | | 1 | | 4 | | 155 | | 1954 | | 4101 | | 1954 | | 155 | | 4 | | 1 |
| | | 1 | | 5 | | 508 | | 11914 | | 56864 | | 56864 | | 11914 | | 508 | | 5 | | 1 |
| | 1 | | 6 | | 1343 | | 76003 | | 728857 | | 1532496 | | 728857 | | 76003 | | 1343 | | 6 | | 1 |
|
A278657 as a square array
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 1 | 1 | 1 | 1 | 1 | 2 | 3 | 4 | 5 | 6
| | 1 | 1 | 1 | 7 | 25 | 50 | 155 | 508 | 1343
| | 1 | 1 | 7 | 50 | 311 | 1954 | 11914 | 76003
| | 1 | 1 | 25 | 311 | 4101 | 56864 | 728857
| | 1 | 2 | 50 | 1954 | 56864 | 1532496
| | 1 | 3 | 155 | 11914 | 728857
| | 1 | 4 | 508 | 76003
| | 1 | 5 | 1343
| | 1 | 6
| | 1
|
A278657 as an upper right triangle
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 1 | 1 | 1 | 1 | 1 | 2 | 3 | 4 | 5 | 6
| | | 1 | 1 | 1 | 7 | 25 | 50 | 155 | 508 | 1343
| | | | 1 | 1 | 7 | 50 | 311 | 1954 | 11914 | 76003
| | | | | 1 | 1 | 25 | 311 | 4101 | 56864 | 728857
| | | | | | 1 | 2 | 50 | 1954 | 56864 | 1532496
| | | | | | | 1 | 3 | 155 | 11914 | 728857
| | | | | | | | 1 | 4 | 508 | 76003
| | | | | | | | | 1 | 5 | 1343
| | | | | | | | | | 1 | 6
| | | | | | | | | | | 1
|
|
