A022818 as a triangular array
| | | | | | | | | | | | 1 |
| | | | | | | | | | | | 1 | | 1 |
| | | | | | | | | | | 1 | | 2 | | 1 |
| | | | | | | | | | 1 | | 3 | | 3 | | 1 |
| | | | | | | | | 1 | | 4 | | 6 | | 5 | | 1 |
| | | | | | | | 1 | | 5 | | 10 | | 13 | | 7 | | 1 |
| | | | | | | 1 | | 6 | | 15 | | 26 | | 23 | | 11 | | 1 |
| | | | | | 1 | | 7 | | 21 | | 45 | | 55 | | 44 | | 15 | | 1 |
| | | | | 1 | | 8 | | 28 | | 71 | | 110 | | 121 | | 74 | | 22 | | 1 |
| | | | 1 | | 9 | | 36 | | 105 | | 196 | | 271 | | 237 | | 129 | | 30 | | 1 |
| | | 1 | | 10 | | 45 | | 148 | | 322 | | 532 | | 599 | | 468 | | 210 | | 42 | | 1 |
| | 1 | | 11 | | 55 | | 201 | | 498 | | 952 | | 1301 | | 1309 | | 867 | | 345 | | 56 | | 1 |
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A022818 as a square array
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11
| | 1 | 3 | 6 | 10 | 15 | 21 | 28 | 36 | 45 | 55
| | 1 | 5 | 13 | 26 | 45 | 71 | 105 | 148 | 201
| | 1 | 7 | 23 | 55 | 110 | 196 | 322 | 498
| | 1 | 11 | 44 | 121 | 271 | 532 | 952
| | 1 | 15 | 74 | 237 | 599 | 1301
| | 1 | 22 | 129 | 468 | 1309
| | 1 | 30 | 210 | 867
| | 1 | 42 | 345
| | 1 | 56
| | 1
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A022818 as an upper right triangle
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11
| | | 1 | 3 | 6 | 10 | 15 | 21 | 28 | 36 | 45 | 55
| | | | 1 | 5 | 13 | 26 | 45 | 71 | 105 | 148 | 201
| | | | | 1 | 7 | 23 | 55 | 110 | 196 | 322 | 498
| | | | | | 1 | 11 | 44 | 121 | 271 | 532 | 952
| | | | | | | 1 | 15 | 74 | 237 | 599 | 1301
| | | | | | | | 1 | 22 | 129 | 468 | 1309
| | | | | | | | | 1 | 30 | 210 | 867
| | | | | | | | | | 1 | 42 | 345
| | | | | | | | | | | 1 | 56
| | | | | | | | | | | | 1
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