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| n | a(n) |
|---|---|
| 1 | 40 |
| 2 | 3924 |
| 3 | 131345 |
| 4 | 3476928 |
| 5 | 82613904 |
| 6 | 1840258874 |
| 7 | 39229935270 |
| 8 | 809714005005 |
| 9 | 16301446350838 |
| 10 | 321725691680589 |
| 11 | 6247090415396847 |
| 12 | 119665707667897987 |
| 13 | 2265983192057928009 |
| 14 | 42485559978048128856 |
| 15 | 789743391503380249568 |
[40,3924,131345,3476928,82613904,1840258874, 39229935270,809714005005,16301446350838, 321725691680589,6247090415396847, 119665707667897987,2265983192057928009, 42485559978048128856,789743391503380249568] |