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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 11 |
| 3 | 103 |
| 4 | 1377 |
| 5 | 24101 |
| 6 | 523813 |
| 7 | 13636463 |
| 8 | 414246017 |
| 9 | 14396807161 |
| 10 | 563682761541 |
| 11 | 24559156435595 |
| 12 | 1178780540094193 |
| 13 | 61810491468265541 |
| 14 | 3515914378433242997 |
| 15 | 215647516162031069191 |
| 16 | 14187967957218808201089 |
| 17 | 996767406049512569338481 |
| 18 | 74478502236949781909301253 |
[1,2,11,103,1377,24101,523813,13636463,414246017, 14396807161,563682761541,24559156435595, 1178780540094193,61810491468265541, 3515914378433242997,215647516162031069191, 14187967957218808201089,996767406049512569338481, 74478502236949781909301253] |