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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 41 |
| 3 | 1299 |
| 4 | 74609 |
| 5 | 6787811 |
| 6 | 898506649 |
| 7 | 163241051315 |
| 8 | 39007280136801 |
| 9 | 11866656488375747 |
| 10 | 4479287777805494665 |
| 11 | 2054673461380880189779 |
| 12 | 1125793481954983195433681 |
| 13 | 726247496033154181534638755 |
[1,3,41,1299,74609,6787811,898506649,163241051315, 39007280136801,11866656488375747, 4479287777805494665,2054673461380880189779, 1125793481954983195433681, 726247496033154181534638755] |