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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 4 |
| 2 | 99 |
| 3 | 21924 |
| 4 | 45207549 |
| 5 | 864861114348 |
| 6 | 151334173143255375 |
| 7 | 240066309264838323117084 |
| 8 | 3437872832425973181485795041113 |
| 9 | 443629285029172409524181790790692095604 |
| 10 | 515464807018375729400140781858676274403447441691 |
| 11 | 5391365666991000164547212259503680126841305476860172028212 |
[1,4,99,21924,45207549,864861114348, 151334173143255375,240066309264838323117084, 3437872832425973181485795041113, 443629285029172409524181790790692095604, 515464807018375729400140781858676274403447441691, 53913656669910001645472122595036801268413054768601\ 72028212] |