A033291 formatted as a triangular array:
| | | | | | | | | 1 | | | | | | | | | |
| | | | | | | | 2 | | 4 | | | | | | | | |
| | | | | | | 6 | | 9 | | 12 | | | | | | | |
| | | | | | 16 | | 20 | | 24 | | 28 | | | | | | |
| | | | | 30 | | 35 | | 40 | | 45 | | 50 | | | | | |
| | | | 54 | | 60 | | 66 | | 72 | | 78 | | 84 | | | | |
| | | 91 | | 98 | | 105 | | 112 | | 119 | | 126 | | 133 | | | |
| | 136 | | 144 | | 152 | | 160 | | 168 | | 176 | | 184 | | 192 | | |
| 198 | | 207 | | 216 | | 225 | | 234 | | 243 | | 252 | | 261 | | 270 | |
| 280 | | 290 | | 300 | | 310 | | 320 | | 330 | | 340 | | 350 | | 360 | | 370 |
A033291 formatted as a square array:
| 1 | 2 | 6 | 16 | 30 | 54 | 91 | 136 | 198 | 280 |
| 4 | 9 | 20 | 35 | 60 | 98 | 144 | 207 | 290 | |
| 12 | 24 | 40 | 66 | 105 | 152 | 216 | 300 | | |
| 28 | 45 | 72 | 112 | 160 | 225 | 310 | | | |
| 50 | 78 | 119 | 168 | 234 | 320 | | | | |
| 84 | 126 | 176 | 243 | 330 | | | | | |
| 133 | 184 | 252 | 340 | | | | | | |
| 192 | 261 | 350 | | | | | | | |
| 270 | 360 | | | | | | | | |
| 370 | | | | | | | | | |
A033291 formatted as an upper right triangle:
| 1 | 2 | 6 | 16 | 30 | 54 | 91 | 136 | 198 | 280 |
| 4 | 9 | 20 | 35 | 60 | 98 | 144 | 207 | 290 |
| | 12 | 24 | 40 | 66 | 105 | 152 | 216 | 300 |
| | | 28 | 45 | 72 | 112 | 160 | 225 | 310 |
| | | | 50 | 78 | 119 | 168 | 234 | 320 |
| | | | | 84 | 126 | 176 | 243 | 330 |
| | | | | | 133 | 184 | 252 | 340 |
| | | | | | | 192 | 261 | 350 |
| | | | | | | | 270 | 360 |
| | | | | | | | | 370 |
|