A250261 as a triangular array
| | | | | | | | | | | | | 1 |
| | | | | | | | | | | | | 1 | | 1 |
| | | | | | | | | | | | 1 | | 1 | | 1 |
| | | | | | | | | | | 1 | | 1 | | 1 | | 2 |
| | | | | | | | | | 1 | | 1 | | 1 | | 1 | | 3 |
| | | | | | | | | 1 | | 1 | | 1 | | 2 | | 1 | | 4 |
| | | | | | | | 1 | | 1 | | 1 | | 2 | | 5 | | 1 | | 5 |
| | | | | | | 1 | | 1 | | 1 | | 2 | | 3 | | 16 | | 1 | | 6 |
| | | | | | 1 | | 1 | | 1 | | 2 | | 3 | | 11 | | 61 | | 1 | | 7 |
| | | | | 1 | | 1 | | 1 | | 2 | | 3 | | 4 | | 40 | | 272 | | 1 | | 8 |
| | | | 1 | | 1 | | 1 | | 2 | | 3 | | 4 | | 19 | | 99 | | 1385 | | 1 | | 9 |
| | | 1 | | 1 | | 1 | | 2 | | 3 | | 4 | | 5 | | 78 | | 589 | | 7936 | | 1 | | 10 |
| | 1 | | 1 | | 1 | | 2 | | 3 | | 4 | | 5 | | 29 | | 217 | | 3194 | | 50521 | | 1 | | 11 |
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A250261 as a square array
1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2
| 3 | 1 | 5 | 3 | 3 | 3 | 3 | 3 | 3
| 4 | 1 | 16 | 11 | 4 | 4 | 4 | 4
| 5 | 1 | 61 | 40 | 19 | 5 | 5
| 6 | 1 | 272 | 99 | 78 | 29
| 7 | 1 | 1385 | 589 | 217
| 8 | 1 | 7936 | 3194
| 9 | 1 | 50521
| 10 | 1
| 11
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A250261 as an upper right triangle
1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | | | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2
| | | | | 3 | 1 | 5 | 3 | 3 | 3 | 3 | 3 | 3
| | | | | | 4 | 1 | 16 | 11 | 4 | 4 | 4 | 4
| | | | | | | 5 | 1 | 61 | 40 | 19 | 5 | 5
| | | | | | | | 6 | 1 | 272 | 99 | 78 | 29
| | | | | | | | | 7 | 1 | 1385 | 589 | 217
| | | | | | | | | | 8 | 1 | 7936 | 3194
| | | | | | | | | | | 9 | 1 | 50521
| | | | | | | | | | | | 10 | 1
| | | | | | | | | | | | | 11
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