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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 389 |
| 3 | 6780 |
| 4 | 258608 |
| 5 | 9482056 |
| 6 | 366298010 |
| 7 | 14485201471 |
| 8 | 574690828973 |
| 9 | 22936158924074 |
| 10 | 916370360035789 |
| 11 | 36648762038150443 |
| 12 | 1466257125537903225 |
| 13 | 58673112644992504445 |
| 14 | 2348058855448212864879 |
| 15 | 93971410987693994357732 |
[1,389,6780,258608,9482056,366298010,14485201471, 574690828973,22936158924074,916370360035789, 36648762038150443,1466257125537903225, 58673112644992504445,2348058855448212864879, 93971410987693994357732] |