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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 3 |
| 3 | 23 |
| 4 | 465 |
| 5 | 19834 |
| 6 | 1532489 |
| 7 | 193746632 |
| 8 | 37368959742 |
| 9 | 10437763731100 |
| 10 | 4054349060577421 |
| 11 | 2119978249890808761 |
| 12 | 1452950920608600023603 |
| 13 | 1276433147589499725385063 |
| 14 | 1410464141866494594480406985 |
| 15 | 1928819743142477893302566583434 |
| 16 | 3218592064882611634798263991387049 |
[1,1,3,23,465,19834,1532489,193746632,37368959742, 10437763731100,4054349060577421, 2119978249890808761,1452950920608600023603, 1276433147589499725385063, 1410464141866494594480406985, 1928819743142477893302566583434, 3218592064882611634798263991387049] |