A209421 as a triangular array
| | | | | | | | | | | | 1 |
| | | | | | | | | | | | 1 | | 1 |
| | | | | | | | | | | 3 | | 1 | | 1 |
| | | | | | | | | | 5 | | 4 | | 1 | | 1 |
| | | | | | | | | 9 | | 7 | | 5 | | 1 | | 1 |
| | | | | | | | 15 | | 15 | | 9 | | 6 | | 1 | | 1 |
| | | | | | | 25 | | 28 | | 22 | | 11 | | 7 | | 1 | | 1 |
| | | | | | 41 | | 53 | | 44 | | 30 | | 13 | | 8 | | 1 | | 1 |
| | | | | 67 | | 97 | | 91 | | 63 | | 39 | | 15 | | 9 | | 1 | | 1 |
| | | | 109 | | 176 | | 179 | | 140 | | 85 | | 49 | | 17 | | 10 | | 1 | | 1 |
| | | 177 | | 315 | | 349 | | 291 | | 201 | | 110 | | 60 | | 19 | | 11 | | 1 | | 1 |
| | 287 | | 559 | | 667 | | 601 | | 437 | | 275 | | 138 | | 72 | | 21 | | 12 | | 1 | | 1 |
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A209421 as a square array
| 1 | 1 | 3 | 5 | 9 | 15 | 25 | 41 | 67 | 109 | 177 | 287
| | 1 | 1 | 4 | 7 | 15 | 28 | 53 | 97 | 176 | 315 | 559
| | 1 | 1 | 5 | 9 | 22 | 44 | 91 | 179 | 349 | 667
| | 1 | 1 | 6 | 11 | 30 | 63 | 140 | 291 | 601
| | 1 | 1 | 7 | 13 | 39 | 85 | 201 | 437
| | 1 | 1 | 8 | 15 | 49 | 110 | 275
| | 1 | 1 | 9 | 17 | 60 | 138
| | 1 | 1 | 10 | 19 | 72
| | 1 | 1 | 11 | 21
| | 1 | 1 | 12
| | 1 | 1
| | 1
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A209421 as an upper right triangle
| 1 | 1 | 3 | 5 | 9 | 15 | 25 | 41 | 67 | 109 | 177 | 287
| | 1 | 1 | 4 | 7 | 15 | 28 | 53 | 97 | 176 | 315 | 559
| | | 1 | 1 | 5 | 9 | 22 | 44 | 91 | 179 | 349 | 667
| | | | 1 | 1 | 6 | 11 | 30 | 63 | 140 | 291 | 601
| | | | | 1 | 1 | 7 | 13 | 39 | 85 | 201 | 437
| | | | | | 1 | 1 | 8 | 15 | 49 | 110 | 275
| | | | | | | 1 | 1 | 9 | 17 | 60 | 138
| | | | | | | | 1 | 1 | 10 | 19 | 72
| | | | | | | | | 1 | 1 | 11 | 21
| | | | | | | | | | 1 | 1 | 12
| | | | | | | | | | | 1 | 1
| | | | | | | | | | | | 1
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