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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 33 |
| 3 | 573 |
| 4 | 13617 |
| 5 | 411183 |
| 6 | 15072489 |
| 7 | 650252529 |
| 8 | 32284539009 |
| 9 | 1813630146651 |
| 10 | 113752664510769 |
| 11 | 7880888252411397 |
| 12 | 597800960080948017 |
| 13 | 49282909533714860487 |
| 14 | 4388007245760196544313 |
| 15 | 419685340277699761142457 |
| 16 | 42916708159524954104566401 |
| 17 | 4672893727892359767041996211 |
[1,3,33,573,13617,411183,15072489,650252529, 32284539009,1813630146651,113752664510769, 7880888252411397,597800960080948017, 49282909533714860487,4388007245760196544313, 419685340277699761142457, 42916708159524954104566401, 4672893727892359767041996211] |