A138155 as a triangular array
| | | | | | | | | | | 1 |
| | | | | | | | | | | 1 | | 1 |
| | | | | | | | | | 1 | | 2 | | 1 |
| | | | | | | | | 1 | | 4 | | 3 | | 1 |
| | | | | | | | 1 | | 7 | | 8 | | 4 | | 1 |
| | | | | | | 1 | | 12 | | 19 | | 13 | | 5 | | 1 |
| | | | | | 1 | | 20 | | 42 | | 37 | | 19 | | 6 | | 1 |
| | | | | 1 | | 33 | | 89 | | 97 | | 62 | | 26 | | 7 | | 1 |
| | | | 1 | | 54 | | 183 | | 240 | | 184 | | 95 | | 34 | | 8 | | 1 |
| | | 1 | | 88 | | 368 | | 570 | | 511 | | 312 | | 137 | | 43 | | 9 | | 1 |
| | 1 | | 143 | | 728 | | 1312 | | 1351 | | 951 | | 491 | | 189 | | 53 | | 10 | | 1 |
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A138155 as a square array
1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| 1 | 2 | 4 | 7 | 12 | 20 | 33 | 54 | 88 | 143
| 1 | 3 | 8 | 19 | 42 | 89 | 183 | 368 | 728
| 1 | 4 | 13 | 37 | 97 | 240 | 570 | 1312
| 1 | 5 | 19 | 62 | 184 | 511 | 1351
| 1 | 6 | 26 | 95 | 312 | 951
| 1 | 7 | 34 | 137 | 491
| 1 | 8 | 43 | 189
| 1 | 9 | 53
| 1 | 10
| 1
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A138155 as an upper right triangle
1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 1 | 2 | 4 | 7 | 12 | 20 | 33 | 54 | 88 | 143
| | | 1 | 3 | 8 | 19 | 42 | 89 | 183 | 368 | 728
| | | | 1 | 4 | 13 | 37 | 97 | 240 | 570 | 1312
| | | | | 1 | 5 | 19 | 62 | 184 | 511 | 1351
| | | | | | 1 | 6 | 26 | 95 | 312 | 951
| | | | | | | 1 | 7 | 34 | 137 | 491
| | | | | | | | 1 | 8 | 43 | 189
| | | | | | | | | 1 | 9 | 53
| | | | | | | | | | 1 | 10
| | | | | | | | | | | 1
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