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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 7 |
| 2 | 406 |
| 3 | 102340 |
| 4 | 83369265 |
| 5 | 179224992408 |
| 6 | 878487565272240 |
| 7 | 8800321588119330984 |
| 8 | 165564847349896309234920 |
| 9 | 5470105884755875924791320090 |
| 10 | 300550263698274781577833262263448 |
| 11 | 26251679033395309424785182716562495776 |
| 12 | 3509663406416043297299781592276029113718775 |
[1,7,406,102340,83369265,179224992408, 878487565272240,8800321588119330984, 165564847349896309234920, 5470105884755875924791320090, 300550263698274781577833262263448, 26251679033395309424785182716562495776, 3509663406416043297299781592276029113718775] |