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| n | a(n) |
|---|---|
| 2 | 2 |
| 3 | 11 |
| 4 | 114 |
| 5 | 894 |
| 6 | 13155 |
| 7 | 127041 |
| 8 | 2219826 |
| 9 | 44489860 |
| 10 | 1023485967 |
| 11 | 26436195405 |
| 12 | 755182183459 |
| 13 | 23609378957430 |
| 14 | 802775563829902 |
| 15 | 29480898988179429 |
| 16 | 1162849454580682365 |
[2,11,114,894,13155,127041,2219826,44489860, 1023485967,26436195405,755182183459, 23609378957430,802775563829902,29480898988179429, 1162849454580682365] |