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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 33 |
| 3 | 819 |
| 4 | 37281 |
| 5 | 2720643 |
| 6 | 291107457 |
| 7 | 42945429747 |
| 8 | 8354465297601 |
| 9 | 2072193715976067 |
| 10 | 638269648981638753 |
| 11 | 239021193599722872627 |
| 12 | 106946291677392350660961 |
| 13 | 56346809266835212819000323 |
| 14 | 34528790475992735166895973313 |
| 15 | 24349545528533035663737512791539 |
[1,3,33,819,37281,2720643,291107457,42945429747, 8354465297601,2072193715976067,638269648981638753, 239021193599722872627,106946291677392350660961, 56346809266835212819000323, 34528790475992735166895973313, 24349545528533035663737512791539] |