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| n | a(n) |
|---|---|
| 1 | 7 |
| 2 | 59 |
| 3 | 549 |
| 4 | 5167 |
| 5 | 48689 |
| 6 | 458859 |
| 7 | 4324477 |
| 8 | 40755719 |
| 9 | 384099369 |
| 10 | 3619917187 |
| 11 | 34115652149 |
| 12 | 321520538079 |
| 13 | 3030147451297 |
| 14 | 28557409213979 |
| 15 | 269137272730989 |
| 16 | 2536465091434807 |
| 17 | 23904734913837209 |
| 18 | 225288474590274099 |
[7,59,549,5167,48689,458859,4324477,40755719, 384099369,3619917187,34115652149,321520538079, 3030147451297,28557409213979,269137272730989, 2536465091434807,23904734913837209, 225288474590274099] |