A215870 as a triangular array
| | | | | | | | | | | | | 1 |
| | | | | | | | | | | | | 1 | | 1 |
| | | | | | | | | | | | 1 | | 1 | | 1 |
| | | | | | | | | | | 1 | | 1 | | 1 | | 1 |
| | | | | | | | | | 1 | | 2 | | 1 | | 1 | | 1 |
| | | | | | | | | 1 | | 2 | | 2 | | 1 | | 1 | | 1 |
| | | | | | | | 1 | | 5 | | 4 | | 4 | | 1 | | 1 | | 1 |
| | | | | | | 1 | | 5 | | 12 | | 10 | | 4 | | 1 | | 1 | | 1 |
| | | | | | 1 | | 14 | | 29 | | 78 | | 20 | | 8 | | 1 | | 1 | | 1 |
| | | | | 1 | | 14 | | 110 | | 262 | | 189 | | 50 | | 8 | | 1 | | 1 | | 1 |
| | | | 1 | | 42 | | 290 | | 3001 | | 1642 | | 1233 | | 100 | | 16 | | 1 | | 1 | | 1 |
| | | 1 | | 42 | | 1274 | | 11694 | | 26451 | | 15485 | | 2988 | | 250 | | 16 | | 1 | | 1 | | 1 |
| | 1 | | 132 |
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A215870 as a square array
1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| 1 | 1 | 1 | 2 | 2 | 5 | 5 | 14 | 14 | 42 | 42 | 132
| 1 | 1 | 1 | 2 | 4 | 12 | 29 | 110 | 290 | 1274
| 1 | 1 | 1 | 4 | 10 | 78 | 262 | 3001 | 11694
| 1 | 1 | 1 | 4 | 20 | 189 | 1642 | 26451
| 1 | 1 | 1 | 8 | 50 | 1233 | 15485
| 1 | 1 | 1 | 8 | 100 | 2988
| 1 | 1 | 1 | 16 | 250
| 1 | 1 | 1 | 16
| 1 | 1 | 1
| 1 | 1
| 1
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A215870 as an upper right triangle
1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 1 | 1 | 1 | 2 | 2 | 5 | 5 | 14 | 14 | 42 | 42 | 132
| | | 1 | 1 | 1 | 2 | 4 | 12 | 29 | 110 | 290 | 1274
| | | | 1 | 1 | 1 | 4 | 10 | 78 | 262 | 3001 | 11694
| | | | | 1 | 1 | 1 | 4 | 20 | 189 | 1642 | 26451
| | | | | | 1 | 1 | 1 | 8 | 50 | 1233 | 15485
| | | | | | | 1 | 1 | 1 | 8 | 100 | 2988
| | | | | | | | 1 | 1 | 1 | 16 | 250
| | | | | | | | | 1 | 1 | 1 | 16
| | | | | | | | | | 1 | 1 | 1
| | | | | | | | | | | 1 | 1
| | | | | | | | | | | | 1
| | | | | | | | | | | |
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