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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 4 |
| 3 | 35 |
| 4 | 740 |
| 5 | 34629 |
| 6 | 3581894 |
| 7 | 802937479 |
| 8 | 386655984648 |
| 9 | 396751196145673 |
| 10 | 862046936883049482 |
| 11 | 3946154005780155709451 |
| 12 | 37896676657907955726032908 |
| 13 | 760791471852690599411320471565 |
| 14 | 31830237745009483676211065390546958 |
| 15 | 2768049771339996987073597682850993569807 |
[1,1,4,35,740,34629,3581894,802937479, 386655984648,396751196145673,862046936883049482, 3946154005780155709451,37896676657907955726032908, 760791471852690599411320471565, 31830237745009483676211065390546958, 2768049771339996987073597682850993569807] |