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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 13 |
| 3 | 114 |
| 4 | 1146 |
| 5 | 12578 |
| 6 | 146581 |
| 7 | 1784114 |
| 8 | 22443232 |
| 9 | 289721772 |
| 10 | 3818789778 |
| 11 | 51205458186 |
| 12 | 696532306614 |
| 13 | 9590979868122 |
| 14 | 133456745720613 |
| 15 | 1874038107800370 |
| 16 | 26527162393038300 |
| 17 | 378160443213077840 |
| 18 | 5424985742151048640 |
| 19 | 78266294077222701884 |
| 20 | 1134914052039617826556 |
[2,13,114,1146,12578,146581,1784114,22443232, 289721772,3818789778,51205458186,696532306614, 9590979868122,133456745720613,1874038107800370, 26527162393038300,378160443213077840, 5424985742151048640,78266294077222701884, 1134914052039617826556] |