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| n | a(n) |
|---|---|
| 1 | 9 |
| 2 | 77 |
| 3 | 633 |
| 4 | 5021 |
| 5 | 38409 |
| 6 | 283277 |
| 7 | 2019033 |
| 8 | 13963901 |
| 9 | 94144809 |
| 10 | 621444077 |
| 11 | 4031587833 |
| 12 | 25787305181 |
| 13 | 163054382409 |
| 14 | 1021372934477 |
| 15 | 6349128459033 |
| 16 | 39222102764861 |
| 17 | 241061530639209 |
| 18 | 1475385002210477 |
| 19 | 8998880800344633 |
| 20 | 54732125638998941 |
[9,77,633,5021,38409,283277,2019033,13963901, 94144809,621444077,4031587833,25787305181, 163054382409,1021372934477,6349128459033, 39222102764861,241061530639209,1475385002210477, 8998880800344633,54732125638998941] |