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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 3 |
| 3 | 17 |
| 4 | 152 |
| 5 | 1933 |
| 6 | 32608 |
| 7 | 695657 |
| 8 | 18148533 |
| 9 | 564860131 |
| 10 | 20581455139 |
| 11 | 864802010595 |
| 12 | 41392831046804 |
| 13 | 2233799248861031 |
| 14 | 134737655762330602 |
| 15 | 9015762313899965851 |
| 16 | 664889968074287179739 |
[1,1,3,17,152,1933,32608,695657,18148533, 564860131,20581455139,864802010595,41392831046804, 2233799248861031,134737655762330602, 9015762313899965851,664889968074287179739] |