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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 6 |
| 3 | 34 |
| 4 | 307 |
| 5 | 3433 |
| 6 | 50883 |
| 7 | 874427 |
| 8 | 17717436 |
| 9 | 405157609 |
| 10 | 10414924259 |
| 11 | 295726594871 |
| 12 | 9214021138217 |
| 13 | 312089127730471 |
| 14 | 11424774176377721 |
| 15 | 449318695089164129 |
| 16 | 18896344248070459234 |
| 17 | 846136606134407223412 |
| 18 | 40192694877626586149007 |
| 19 | 2018612350537940175272987 |
[1,6,34,307,3433,50883,874427,17717436,405157609, 10414924259,295726594871,9214021138217, 312089127730471,11424774176377721, 449318695089164129,18896344248070459234, 846136606134407223412,40192694877626586149007, 2018612350537940175272987] |