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| n | a(n) |
|---|---|
| 1 | 5 |
| 2 | 157 |
| 3 | 509 |
| 4 | 392 |
| 5 | 25047 |
| 6 | 144106 |
| 7 | 625739 |
| 8 | 8072260 |
| 9 | 60509347 |
| 10 | 401788861 |
| 11 | 3559142414 |
| 12 | 28264968587 |
| 13 | 212858030531 |
| 14 | 1726856604274 |
| 15 | 13736918760177 |
| 16 | 107239778635445 |
| 17 | 852947266604901 |
| 18 | 6765163110521794 |
| 19 | 53339268912846789 |
| 20 | 422445562993184549 |
[5,157,509,392,25047,144106,625739,8072260, 60509347,401788861,3559142414,28264968587, 212858030531,1726856604274,13736918760177, 107239778635445,852947266604901,6765163110521794, 53339268912846789,422445562993184549] |