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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 9 |
| 4 | 36 |
| 5 | 184 |
| 6 | 1105 |
| 7 | 7736 |
| 8 | 61893 |
| 9 | 557043 |
| 10 | 5570436 |
| 11 | 61274803 |
| 12 | 735297637 |
| 13 | 9558869287 |
| 14 | 133824170031 |
| 15 | 2007362550467 |
| 16 | 32117800807487 |
| 17 | 546002613727291 |
| 18 | 9828047047091253 |
| 19 | 186732893894733813 |
| 20 | 3734657877894676273 |
[1,3,9,36,184,1105,7736,61893,557043,5570436, 61274803,735297637,9558869287,133824170031, 2007362550467,32117800807487,546002613727291, 9828047047091253,186732893894733813, 3734657877894676273] |