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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 13 |
| 3 | 577 |
| 4 | 65737 |
| 5 | 17553361 |
| 6 | 10704000277 |
| 7 | 14796719274961 |
| 8 | 46078793355045073 |
| 9 | 320622833897384770657 |
| 10 | 4940987529761176087132381 |
| 11 | 167239138427197351352909547169 |
| 12 | 12340269209872740741602975099855641 |
[1,1,13,577,65737,17553361,10704000277, 14796719274961,46078793355045073, 320622833897384770657,4940987529761176087132381, 167239138427197351352909547169, 12340269209872740741602975099855641] |