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| n | a(n) |
|---|---|
| 0 | 2 |
| 1 | 21 |
| 2 | 208 |
| 3 | 2059 |
| 4 | 20382 |
| 5 | 201761 |
| 6 | 1997228 |
| 7 | 19770519 |
| 8 | 195707962 |
| 9 | 1937309101 |
| 10 | 19177383048 |
| 11 | 189836521379 |
| 12 | 1879187830742 |
| 13 | 18602041786041 |
| 14 | 184141230029668 |
| 15 | 1822810258510639 |
| 16 | 18043961355076722 |
| 17 | 178616803292256581 |
| 18 | 1768124071567489088 |
| 19 | 17502623912382634299 |
[2,21,208,2059,20382,201761,1997228,19770519, 195707962,1937309101,19177383048,189836521379, 1879187830742,18602041786041,184141230029668, 1822810258510639,18043961355076722, 178616803292256581,1768124071567489088, 17502623912382634299] |