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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 8 |
| 4 | 152 |
| 5 | 4493 |
| 6 | 202066 |
| 7 | 12841750 |
| 8 | 1097043147 |
| 9 | 121284672716 |
| 10 | 16850062144162 |
| 11 | 2873723485196575 |
| 12 | 590279507847844136 |
| 13 | 143737044733324878879 |
| 14 | 40943428029694983816963 |
| 15 | 13488163010054730357533318 |
| 16 | 5088553275271661089776406989 |
[1,1,8,152,4493,202066,12841750,1097043147, 121284672716,16850062144162,2873723485196575, 590279507847844136,143737044733324878879, 40943428029694983816963, 13488163010054730357533318, 5088553275271661089776406989] |