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| n | a(n) |
|---|---|
| 1 | 303 |
| 2 | 1791 |
| 3 | 10702 |
| 4 | 66853 |
| 5 | 419301 |
| 6 | 2680296 |
| 7 | 17221539 |
| 8 | 111813697 |
| 9 | 729282012 |
| 10 | 4786748055 |
| 11 | 31528549737 |
| 12 | 208503506840 |
| 13 | 1382369251257 |
| 14 | 9189156815701 |
| 15 | 61193561041026 |
| 16 | 408217953424503 |
| 17 | 2726599132619631 |
| 18 | 18232898224831510 |
[303,1791,10702,66853,419301,2680296,17221539, 111813697,729282012,4786748055,31528549737, 208503506840,1382369251257,9189156815701, 61193561041026,408217953424503,2726599132619631, 18232898224831510] |