A028412 formatted as a triangular array:
| | | | | | | | | 1 | | | | | | | | | |
| | | | | | | | 1 | | 1 | | | | | | | | |
| | | | | | | 1 | | 3 | | 2 | | | | | | | |
| | | | | | 1 | | 4 | | 8 | | 3 | | | | | | |
| | | | | 1 | | 7 | | 17 | | 21 | | 5 | | | | | |
| | | | 1 | | 11 | | 48 | | 72 | | 55 | | 8 | | | | |
| | | 1 | | 18 | | 122 | | 329 | | 305 | | 144 | | 13 | | | |
| | 1 | | 29 | | 323 | | 1353 | | 2255 | | 1292 | | 377 | | 21 | | |
| 1 | | 47 | | 842 | | 5796 | | 15005 | | 15456 | | 5473 | | 987 | | 34 | |
| 1 | | 76 | | 2208 | | 24447 | | 104005 | | 166408 | | 105937 | | 23184 | | 2584 | | 55 |
A028412 formatted as a square array:
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| 1 | 3 | 4 | 7 | 11 | 18 | 29 | 47 | 76 | |
| 2 | 8 | 17 | 48 | 122 | 323 | 842 | 2208 | | |
| 3 | 21 | 72 | 329 | 1353 | 5796 | 24447 | | | |
| 5 | 55 | 305 | 2255 | 15005 | 104005 | | | | |
| 8 | 144 | 1292 | 15456 | 166408 | | | | | |
| 13 | 377 | 5473 | 105937 | | | | | | |
| 21 | 987 | 23184 | | | | | | | |
| 34 | 2584 | | | | | | | | |
| 55 | | | | | | | | | |
A028412 formatted as an upper right triangle:
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| 1 | 3 | 4 | 7 | 11 | 18 | 29 | 47 | 76 |
| | 2 | 8 | 17 | 48 | 122 | 323 | 842 | 2208 |
| | | 3 | 21 | 72 | 329 | 1353 | 5796 | 24447 |
| | | | 5 | 55 | 305 | 2255 | 15005 | 104005 |
| | | | | 8 | 144 | 1292 | 15456 | 166408 |
| | | | | | 13 | 377 | 5473 | 105937 |
| | | | | | | 21 | 987 | 23184 |
| | | | | | | | 34 | 2584 |
| | | | | | | | | 55 |
|