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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 209 |
| 3 | 40391 |
| 4 | 15003009 |
| 5 | 9127651499 |
| 6 | 8254109243953 |
| 7 | 10393834843080975 |
| 8 | 17391182043967249409 |
| 9 | 37326390852372133364819 |
| 10 | 99976027392046047055178001 |
| 11 | 326887883645157139828711692503 |
| 12 | 1281398359905415379814555044995201 |
| 13 | 5932135472283024519893762690145006075 |
[1,3,209,40391,15003009,9127651499,8254109243953, 10393834843080975,17391182043967249409, 37326390852372133364819, 99976027392046047055178001, 326887883645157139828711692503, 1281398359905415379814555044995201, 5932135472283024519893762690145006075] |