A257558 as a triangular array
| | | | | | | | | | | 1 |
| | | | | | | | | | | 1 | | 1 |
| | | | | | | | | | 3 | | 2 | | 1 |
| | | | | | | | | 6 | | 7 | | 3 | | 1 |
| | | | | | | | 16 | | 18 | | 12 | | 4 | | 1 |
| | | | | | | 47 | | 53 | | 37 | | 18 | | 5 | | 1 |
| | | | | | 146 | | 162 | | 120 | | 64 | | 25 | | 6 | | 1 |
| | | | | 471 | | 518 | | 390 | | 227 | | 100 | | 33 | | 7 | | 1 |
| | | | 1562 | | 1708 | | 1299 | | 788 | | 385 | | 146 | | 42 | | 8 | | 1 |
| | | 5291 | | 5762 | | 4410 | | 2750 | | 1426 | | 606 | | 203 | | 52 | | 9 | | 1 |
| | 18226 | | 19788 | | 15216 | | 9664 | | 5225 | | 2388 | | 903 | | 272 | | 63 | | 10 | | 1 |
|
A257558 as a square array
| 1 | 1 | 3 | 6 | 16 | 47 | 146 | 471 | 1562 | 5291 | 18226
| | 1 | 2 | 7 | 18 | 53 | 162 | 518 | 1708 | 5762 | 19788
| | 1 | 3 | 12 | 37 | 120 | 390 | 1299 | 4410 | 15216
| | 1 | 4 | 18 | 64 | 227 | 788 | 2750 | 9664
| | 1 | 5 | 25 | 100 | 385 | 1426 | 5225
| | 1 | 6 | 33 | 146 | 606 | 2388
| | 1 | 7 | 42 | 203 | 903
| | 1 | 8 | 52 | 272
| | 1 | 9 | 63
| | 1 | 10
| | 1
|
A257558 as an upper right triangle
| 1 | 1 | 3 | 6 | 16 | 47 | 146 | 471 | 1562 | 5291 | 18226
| | 1 | 2 | 7 | 18 | 53 | 162 | 518 | 1708 | 5762 | 19788
| | | 1 | 3 | 12 | 37 | 120 | 390 | 1299 | 4410 | 15216
| | | | 1 | 4 | 18 | 64 | 227 | 788 | 2750 | 9664
| | | | | 1 | 5 | 25 | 100 | 385 | 1426 | 5225
| | | | | | 1 | 6 | 33 | 146 | 606 | 2388
| | | | | | | 1 | 7 | 42 | 203 | 903
| | | | | | | | 1 | 8 | 52 | 272
| | | | | | | | | 1 | 9 | 63
| | | | | | | | | | 1 | 10
| | | | | | | | | | | 1
|
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