A000012 as a triangular 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 |
| | | | | | 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 | | 1 | | 1 | | 1 | | 1 | | 1 | | 1 |
| | 1 | | 1 | | 1 | | 1 | | 1 | | 1 | | 1 | | 1 | | 1 | | 1 | | 1 | | 1 |
|
A000012 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
| | 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 | 1 | 1 | 1 | 1
| | 1 | 1 | 1 | 1 | 1
| | 1 | 1 | 1 | 1
| | 1 | 1 | 1
| | 1 | 1
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A000012 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
| | | | 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 | 1 | 1 | 1 | 1
| | | | | | | | | 1 | 1 | 1 | 1 | 1
| | | | | | | | | | 1 | 1 | 1 | 1
| | | | | | | | | | | 1 | 1 | 1
| | | | | | | | | | | | 1 | 1
| | | | | | | | | | | |
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