A077028 formatted as a triangular array:
| | | | | | | | | | | 1 | | | | | | | | | | | |
| | | | | | | | | | 1 | | 1 | | | | | | | | | | |
| | | | | | | | | 1 | | 2 | | 1 | | | | | | | | | |
| | | | | | | | 1 | | 3 | | 3 | | 1 | | | | | | | | |
| | | | | | | 1 | | 4 | | 5 | | 4 | | 1 | | | | | | | |
| | | | | | 1 | | 5 | | 7 | | 7 | | 5 | | 1 | | | | | | |
| | | | | 1 | | 6 | | 9 | | 10 | | 9 | | 6 | | 1 | | | | | |
| | | | 1 | | 7 | | 11 | | 13 | | 13 | | 11 | | 7 | | 1 | | | | |
| | | 1 | | 8 | | 13 | | 16 | | 17 | | 16 | | 13 | | 8 | | 1 | | | |
| | 1 | | 9 | | 15 | | 19 | | 21 | | 21 | | 19 | | 15 | | 9 | | 1 | | |
| 1 | | 10 | | 17 | | 22 | | 25 | | 26 | | 25 | | 22 | | 17 | | 10 | | 1 | |
| 1 | | 11 | | 19 | | 25 | | 29 | | 31 | | 31 | | 29 | | 25 | | 19 | | 11 | | 1 |
A077028 formatted as a square array:
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | |
| 1 | 3 | 5 | 7 | 9 | 11 | 13 | 15 | 17 | 19 | | |
| 1 | 4 | 7 | 10 | 13 | 16 | 19 | 22 | 25 | | | |
| 1 | 5 | 9 | 13 | 17 | 21 | 25 | 29 | | | | |
| 1 | 6 | 11 | 16 | 21 | 26 | 31 | | | | | |
| 1 | 7 | 13 | 19 | 25 | 31 | | | | | | |
| 1 | 8 | 15 | 22 | 29 | | | | | | | |
| 1 | 9 | 17 | 25 | | | | | | | | |
| 1 | 10 | 19 | | | | | | | | | |
| 1 | 11 | | | | | | | | | | |
| 1 | | | | | | | | | | | |
A077028 formatted as an upper right triangle:
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 |
| | 1 | 3 | 5 | 7 | 9 | 11 | 13 | 15 | 17 | 19 |
| | | 1 | 4 | 7 | 10 | 13 | 16 | 19 | 22 | 25 |
| | | | 1 | 5 | 9 | 13 | 17 | 21 | 25 | 29 |
| | | | | 1 | 6 | 11 | 16 | 21 | 26 | 31 |
| | | | | | 1 | 7 | 13 | 19 | 25 | 31 |
| | | | | | | 1 | 8 | 15 | 22 | 29 |
| | | | | | | | 1 | 9 | 17 | 25 |
| | | | | | | | | 1 | 10 | 19 |
| | | | | | | | | | 1 | 11 |
| | | | | | | | | | | 1 |
|
