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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 13 |
| 3 | 163 |
| 4 | 2353 |
| 5 | 40501 |
| 6 | 818821 |
| 7 | 18929023 |
| 8 | 489586273 |
| 9 | 13960500553 |
| 10 | 434386210141 |
| 11 | 14631135248731 |
| 12 | 529904353497553 |
| 13 | 20518350666873853 |
| 14 | 845225716194722773 |
| 15 | 36884609685305102071 |
[1,13,163,2353,40501,818821,18929023,489586273, 13960500553,434386210141,14631135248731, 529904353497553,20518350666873853, 845225716194722773,36884609685305102071] |