A210220 as a triangular array
| | | | | | | | | | | 1 |
| | | | | | | | | | | 2 | | 2 |
| | | | | | | | | | 3 | | 6 | | 3 |
| | | | | | | | | 4 | | 12 | | 13 | | 4 |
| | | | | | | | 5 | | 20 | | 34 | | 24 | | 5 |
| | | | | | | 6 | | 30 | | 70 | | 80 | | 40 | | 6 |
| | | | | | 7 | | 42 | | 125 | | 200 | | 166 | | 62 | | 7 |
| | | | | 8 | | 56 | | 203 | | 420 | | 496 | | 314 | | 91 | | 8 |
| | | | 9 | | 72 | | 308 | | 784 | | 1211 | | 1106 | | 553 | | 128 | | 9 |
| | | 10 | | 90 | | 444 | | 1344 | | 2576 | | 3108 | | 2269 | | 920 | | 174 | | 10 |
| | 11 | | 110 | | 615 | | 2160 | | 4956 | | 7476 | | 7274 | | 4352 | | 1461 | | 230 | | 11 |
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A210220 as a square array
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11
| 2 | 6 | 12 | 20 | 30 | 42 | 56 | 72 | 90 | 110
| 3 | 13 | 34 | 70 | 125 | 203 | 308 | 444 | 615
| 4 | 24 | 80 | 200 | 420 | 784 | 1344 | 2160
| 5 | 40 | 166 | 496 | 1211 | 2576 | 4956
| 6 | 62 | 314 | 1106 | 3108 | 7476
| 7 | 91 | 553 | 2269 | 7274
| 8 | 128 | 920 | 4352
| 9 | 174 | 1461
| 10 | 230
| 11
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A210220 as an upper right triangle
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11
| | 2 | 6 | 12 | 20 | 30 | 42 | 56 | 72 | 90 | 110
| | | 3 | 13 | 34 | 70 | 125 | 203 | 308 | 444 | 615
| | | | 4 | 24 | 80 | 200 | 420 | 784 | 1344 | 2160
| | | | | 5 | 40 | 166 | 496 | 1211 | 2576 | 4956
| | | | | | 6 | 62 | 314 | 1106 | 3108 | 7476
| | | | | | | 7 | 91 | 553 | 2269 | 7274
| | | | | | | | 8 | 128 | 920 | 4352
| | | | | | | | | 9 | 174 | 1461
| | | | | | | | | | 10 | 230
| | | | | | | | | | | 11
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