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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 6 |
| 3 | 275 |
| 4 | 7302 |
| 5 | 151310 |
| 6 | 2816826 |
| 7 | 48994058 |
| 8 | 812565760 |
| 9 | 13024726520 |
| 10 | 203381556682 |
| 11 | 3110591645279 |
| 12 | 46778444063114 |
| 13 | 693678151593038 |
| 14 | 10165365611526554 |
| 15 | 147460852901201771 |
| 16 | 2120338836015983926 |
| 17 | 30254039436750997085 |
[0,6,275,7302,151310,2816826,48994058,812565760, 13024726520,203381556682,3110591645279, 46778444063114,693678151593038,10165365611526554, 147460852901201771,2120338836015983926, 30254039436750997085] |