A131909 as a triangular array
| | | | | | | | | | | | 1 |
| | | | | | | | | | | | 1 | | 1 |
| | | | | | | | | | | 1 | | 1 | | 2 |
| | | | | | | | | | 2 | | 1 | | 2 | | 3 |
| | | | | | | | | 3 | | 2 | | 3 | | 3 | | 5 |
| | | | | | | | 5 | | 3 | | 5 | | 5 | | 6 | | 8 |
| | | | | | | 8 | | 5 | | 8 | | 8 | | 10 | | 11 | | 14 |
| | | | | | 14 | | 8 | | 13 | | 13 | | 16 | | 18 | | 21 | | 25 |
| | | | | 25 | | 14 | | 22 | | 21 | | 26 | | 29 | | 34 | | 39 | | 46 |
| | | | 46 | | 25 | | 39 | | 36 | | 43 | | 47 | | 55 | | 63 | | 73 | | 85 |
| | | 85 | | 46 | | 71 | | 64 | | 75 | | 79 | | 90 | | 102 | | 118 | | 136 | | 158 |
| | 158 | | 85 | | 131 | | 117 | | 135 | | 139 | | 154 | | 169 |
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A131909 as a square array
1 | 1 | 1 | 2 | 3 | 5 | 8 | 14 | 25 | 46 | 85 | 158
| 1 | 1 | 1 | 2 | 3 | 5 | 8 | 14 | 25 | 46 | 85
| 2 | 2 | 3 | 5 | 8 | 13 | 22 | 39 | 71 | 131
| 3 | 3 | 5 | 8 | 13 | 21 | 36 | 64 | 117
| 5 | 6 | 10 | 16 | 26 | 43 | 75 | 135
| 8 | 11 | 18 | 29 | 47 | 79 | 139
| 14 | 21 | 34 | 55 | 90 | 154
| 25 | 39 | 63 | 102 | 169
| 46 | 73 | 118
| 85 | 136
| 158
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A131909 as an upper right triangle
1 | 1 | 1 | 2 | 3 | 5 | 8 | 14 | 25 | 46 | 85 | 158
| | 1 | 1 | 1 | 2 | 3 | 5 | 8 | 14 | 25 | 46 | 85
| | | 2 | 2 | 3 | 5 | 8 | 13 | 22 | 39 | 71 | 131
| | | | 3 | 3 | 5 | 8 | 13 | 21 | 36 | 64 | 117
| | | | | 5 | 6 | 10 | 16 | 26 | 43 | 75 | 135
| | | | | | 8 | 11 | 18 | 29 | 47 | 79 | 139
| | | | | | | 14 | 21 | 34 | 55 | 90 | 154
| | | | | | | | 25 | 39 | 63 | 102 | 169
| | | | | | | | | 46 | 73 | 118
| | | | | | | | | | 85 | 136
| | | | | | | | | | | 158
| | | | | | | | | | |
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