A038730 as a triangular array
| | | | | | | | | | 1 |
| | | | | | | | | | 1 | | 2 |
| | | | | | | | | 1 | | 4 | | 5 |
| | | | | | | | 1 | | 6 | | 12 | | 13 |
| | | | | | | 1 | | 8 | | 23 | | 33 | | 34 |
| | | | | | 1 | | 10 | | 38 | | 73 | | 88 | | 89 |
| | | | | 1 | | 12 | | 57 | | 141 | | 211 | | 232 | | 233 |
| | | | 1 | | 14 | | 80 | | 245 | | 455 | | 581 | | 609 | | 610 |
| | | 1 | | 16 | | 107 | | 393 | | 888 | | 1350 | | 1560 | | 1596 | | 1597 |
| | 1 | | 18 | | 138 | | 593 | | 1594 | | 2881 | | 3805 | | 4135 | | 4180 | | 4181 |
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A038730 as a square array
1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| 2 | 4 | 6 | 8 | 10 | 12 | 14 | 16 | 18
| 5 | 12 | 23 | 38 | 57 | 80 | 107 | 138
| 13 | 33 | 73 | 141 | 245 | 393 | 593
| 34 | 88 | 211 | 455 | 888 | 1594
| 89 | 232 | 581 | 1350 | 2881
| 233 | 609 | 1560 | 3805
| 610 | 1596 | 4135
| 1597 | 4180
| 4181
|
A038730 as an upper right triangle
1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 2 | 4 | 6 | 8 | 10 | 12 | 14 | 16 | 18
| | | 5 | 12 | 23 | 38 | 57 | 80 | 107 | 138
| | | | 13 | 33 | 73 | 141 | 245 | 393 | 593
| | | | | 34 | 88 | 211 | 455 | 888 | 1594
| | | | | | 89 | 232 | 581 | 1350 | 2881
| | | | | | | 233 | 609 | 1560 | 3805
| | | | | | | | 610 | 1596 | 4135
| | | | | | | | | 1597 | 4180
| | | | | | | | | | 4181
|
|