A109974 as a triangular array
| | | | | | | | | | | 1 |
| | | | | | | | | | | 2 | | 1 |
| | | | | | | | | | 2 | | 3 | | 1 |
| | | | | | | | | 3 | | 4 | | 5 | | 1 |
| | | | | | | | 2 | | 7 | | 10 | | 9 | | 1 |
| | | | | | | 4 | | 6 | | 21 | | 28 | | 17 | | 1 |
| | | | | | 2 | | 12 | | 26 | | 73 | | 82 | | 33 | | 1 |
| | | | | 4 | | 8 | | 50 | | 126 | | 273 | | 244 | | 65 | | 1 |
| | | | 3 | | 15 | | 50 | | 252 | | 626 | | 1057 | | 730 | | 129 | | 1 |
| | | 4 | | 13 | | 85 | | 344 | | 1394 | | 3126 | | 4161 | | 2188 | | 257 | | 1 |
| | 2 | | 18 | | 91 | | 585 | | 2402 | | 8052 | | 15626 | | 16513 | | 6562 | | 513 | | 1 |
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A109974 as a square array
1 | 2 | 2 | 3 | 2 | 4 | 2 | 4 | 3 | 4 | 2
| 1 | 3 | 4 | 7 | 6 | 12 | 8 | 15 | 13 | 18
| 1 | 5 | 10 | 21 | 26 | 50 | 50 | 85 | 91
| 1 | 9 | 28 | 73 | 126 | 252 | 344 | 585
| 1 | 17 | 82 | 273 | 626 | 1394 | 2402
| 1 | 33 | 244 | 1057 | 3126 | 8052
| 1 | 65 | 730 | 4161 | 15626
| 1 | 129 | 2188 | 16513
| 1 | 257 | 6562
| 1 | 513
| 1
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A109974 as an upper right triangle
1 | 2 | 2 | 3 | 2 | 4 | 2 | 4 | 3 | 4 | 2
| | 1 | 3 | 4 | 7 | 6 | 12 | 8 | 15 | 13 | 18
| | | 1 | 5 | 10 | 21 | 26 | 50 | 50 | 85 | 91
| | | | 1 | 9 | 28 | 73 | 126 | 252 | 344 | 585
| | | | | 1 | 17 | 82 | 273 | 626 | 1394 | 2402
| | | | | | 1 | 33 | 244 | 1057 | 3126 | 8052
| | | | | | | 1 | 65 | 730 | 4161 | 15626
| | | | | | | | 1 | 129 | 2188 | 16513
| | | | | | | | | 1 | 257 | 6562
| | | | | | | | | | 1 | 513
| | | | | | | | | | | 1
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