A278218 as a triangular array
| | | | | | | | | | | | | 1 |
| | | | | | | | | | | | | 1 | | 1 |
| | | | | | | | | | | | 1 | | 2 | | 1 |
| | | | | | | | | | | 1 | | 2 | | 2 | | 1 |
| | | | | | | | | | 1 | | 4 | | 6 | | 4 | | 1 |
| | | | | | | | | 1 | | 2 | | 6 | | 6 | | 2 | | 1 |
| | | | | | | | 1 | | 6 | | 6 | | 12 | | 6 | | 6 | | 1 |
| | | | | | | 1 | | 2 | | 6 | | 6 | | 6 | | 6 | | 2 | | 1 |
| | | | | | 1 | | 8 | | 12 | | 24 | | 30 | | 24 | | 12 | | 8 | | 1 |
| | | | | 1 | | 4 | | 36 | | 60 | | 60 | | 60 | | 60 | | 36 | | 4 | | 1 |
| | | | 1 | | 6 | | 12 | | 120 | | 210 | | 180 | | 210 | | 120 | | 12 | | 6 | | 1 |
| | | 1 | | 2 | | 6 | | 30 | | 210 | | 210 | | 210 | | 210 | | 30 | | 6 | | 2 | | 1 |
| | 1 | | 12 | | 30 | | 60 | | 60 | | 360 | | 420 | | 360 | | 60 | | 60 | | 30 | | 12 | | 1 |
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A278218 as a square array
1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| 1 | 2 | 2 | 4 | 2 | 6 | 2 | 8 | 4 | 6 | 2 | 12
| 1 | 2 | 6 | 6 | 6 | 6 | 12 | 36 | 12 | 6 | 30
| 1 | 4 | 6 | 12 | 6 | 24 | 60 | 120 | 30 | 60
| 1 | 2 | 6 | 6 | 30 | 60 | 210 | 210 | 60
| 1 | 6 | 6 | 24 | 60 | 180 | 210 | 360
| 1 | 2 | 12 | 60 | 210 | 210 | 420
| 1 | 8 | 36 | 120 | 210 | 360
| 1 | 4 | 12 | 30 | 60
| 1 | 6 | 6 | 60
| 1 | 2 | 30
| 1 | 12
| 1
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A278218 as an upper right triangle
1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 1 | 2 | 2 | 4 | 2 | 6 | 2 | 8 | 4 | 6 | 2 | 12
| | | 1 | 2 | 6 | 6 | 6 | 6 | 12 | 36 | 12 | 6 | 30
| | | | 1 | 4 | 6 | 12 | 6 | 24 | 60 | 120 | 30 | 60
| | | | | 1 | 2 | 6 | 6 | 30 | 60 | 210 | 210 | 60
| | | | | | 1 | 6 | 6 | 24 | 60 | 180 | 210 | 360
| | | | | | | 1 | 2 | 12 | 60 | 210 | 210 | 420
| | | | | | | | 1 | 8 | 36 | 120 | 210 | 360
| | | | | | | | | 1 | 4 | 12 | 30 | 60
| | | | | | | | | | 1 | 6 | 6 | 60
| | | | | | | | | | | 1 | 2 | 30
| | | | | | | | | | | | 1 | 12
| | | | | | | | | | | | | 1
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