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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 30 |
| 3 | 372 |
| 4 | 5187 |
| 5 | 77682 |
| 6 | 1220421 |
| 7 | 19842492 |
| 8 | 331047138 |
| 9 | 5635390827 |
| 10 | 97491744102 |
| 11 | 1709067567387 |
| 12 | 30293505154362 |
| 13 | 542010120629052 |
| 14 | 9775907758416999 |
| 15 | 177556754470826046 |
| 16 | 3244682279388126576 |
| 17 | 59614554914471797482 |
| 18 | 1100573677912355195313 |
[1,3,30,372,5187,77682,1220421,19842492,331047138, 5635390827,97491744102,1709067567387, 30293505154362,542010120629052,9775907758416999, 177556754470826046,3244682279388126576, 59614554914471797482,1100573677912355195313] |