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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 13 |
| 4 | 111 |
| 5 | 1686 |
| 6 | 88737 |
| 7 | 14355265 |
| 8 | 3583775847 |
| 9 | 1789371713317 |
| 10 | 4311992850152298 |
| 11 | 23667113846872049808 |
| 12 | 185391762466214524964649 |
| 13 | 4305238471804328835068596175 |
| 14 | 468653724243371951619336632177235 |
[1,3,13,111,1686,88737,14355265,3583775847, 1789371713317,4311992850152298, 23667113846872049808,185391762466214524964649, 4305238471804328835068596175, 468653724243371951619336632177235] |