A271238 as a triangular array
| | | | | | | | | | | 1 |
| | | | | | | | | | | 2 | | 1 |
| | | | | | | | | | 3 | | 3 | | 1 |
| | | | | | | | | 6 | | 12 | | 8 | | 1 |
| | | | | | | | 10 | | 30 | | 30 | | 10 | | 1 |
| | | | | | | 15 | | 60 | | 80 | | 45 | | 12 | | 1 |
| | | | | | 21 | | 105 | | 175 | | 140 | | 63 | | 14 | | 1 |
| | | | | 28 | | 168 | | 336 | | 350 | | 224 | | 84 | | 16 | | 1 |
| | | | 36 | | 252 | | 588 | | 756 | | 630 | | 336 | | 108 | | 18 | | 1 |
| | | 45 | | 360 | | 960 | | 1470 | | 1512 | | 1050 | | 480 | | 135 | | 20 | | 1 |
| | 55 | | 495 | | 1485 | | 2640 | | 3234 | | 2772 | | 1650 | | 660 | | 165 | | 22 | | 1 |
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A271238 as a square array
1 | 2 | 3 | 6 | 10 | 15 | 21 | 28 | 36 | 45 | 55
| 1 | 3 | 12 | 30 | 60 | 105 | 168 | 252 | 360 | 495
| 1 | 8 | 30 | 80 | 175 | 336 | 588 | 960 | 1485
| 1 | 10 | 45 | 140 | 350 | 756 | 1470 | 2640
| 1 | 12 | 63 | 224 | 630 | 1512 | 3234
| 1 | 14 | 84 | 336 | 1050 | 2772
| 1 | 16 | 108 | 480 | 1650
| 1 | 18 | 135 | 660
| 1 | 20 | 165
| 1 | 22
| 1
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A271238 as an upper right triangle
1 | 2 | 3 | 6 | 10 | 15 | 21 | 28 | 36 | 45 | 55
| | 1 | 3 | 12 | 30 | 60 | 105 | 168 | 252 | 360 | 495
| | | 1 | 8 | 30 | 80 | 175 | 336 | 588 | 960 | 1485
| | | | 1 | 10 | 45 | 140 | 350 | 756 | 1470 | 2640
| | | | | 1 | 12 | 63 | 224 | 630 | 1512 | 3234
| | | | | | 1 | 14 | 84 | 336 | 1050 | 2772
| | | | | | | 1 | 16 | 108 | 480 | 1650
| | | | | | | | 1 | 18 | 135 | 660
| | | | | | | | | 1 | 20 | 165
| | | | | | | | | | 1 | 22
| | | | | | | | | | | 1
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