A257556 as a triangular array
| | | | | | | | | | | 1 |
| | | | | | | | | | | 1 | | 1 |
| | | | | | | | | | 3 | | 2 | | 1 |
| | | | | | | | | 3 | | 7 | | 3 | | 1 |
| | | | | | | | 4 | | 12 | | 12 | | 4 | | 1 |
| | | | | | | 4 | | 23 | | 28 | | 18 | | 5 | | 1 |
| | | | | | 4 | | 34 | | 66 | | 52 | | 25 | | 6 | | 1 |
| | | | | 4 | | 49 | | 126 | | 143 | | 85 | | 33 | | 7 | | 1 |
| | | | 4 | | 64 | | 228 | | 328 | | 265 | | 128 | | 42 | | 8 | | 1 |
| | | 4 | | 80 | | 372 | | 700 | | 701 | | 444 | | 182 | | 52 | | 9 | | 1 |
| | 4 | | 96 | | 573 | | 1352 | | 1705 | | 1320 | | 693 | | 248 | | 63 |
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A257556 as a square array
1 | 1 | 3 | 3 | 4 | 4 | 4 | 4 | 4 | 4 | 4
| 1 | 2 | 7 | 12 | 23 | 34 | 49 | 64 | 80 | 96
| 1 | 3 | 12 | 28 | 66 | 126 | 228 | 372 | 573
| 1 | 4 | 18 | 52 | 143 | 328 | 700 | 1352
| 1 | 5 | 25 | 85 | 265 | 701 | 1705
| 1 | 6 | 33 | 128 | 444 | 1320
| 1 | 7 | 42 | 182 | 693
| 1 | 8 | 52 | 248
| 1 | 9 | 63
| 1
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A257556 as an upper right triangle
1 | 1 | 3 | 3 | 4 | 4 | 4 | 4 | 4 | 4 | 4
| | 1 | 2 | 7 | 12 | 23 | 34 | 49 | 64 | 80 | 96
| | | 1 | 3 | 12 | 28 | 66 | 126 | 228 | 372 | 573
| | | | 1 | 4 | 18 | 52 | 143 | 328 | 700 | 1352
| | | | | 1 | 5 | 25 | 85 | 265 | 701 | 1705
| | | | | | 1 | 6 | 33 | 128 | 444 | 1320
| | | | | | | 1 | 7 | 42 | 182 | 693
| | | | | | | | 1 | 8 | 52 | 248
| | | | | | | | | 1 | 9 | 63
| | | | | | | | | | 1
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