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| n | a(n) |
|---|---|
| 1 | 7 |
| 2 | 62 |
| 3 | 501 |
| 4 | 4012 |
| 5 | 32099 |
| 6 | 256794 |
| 7 | 2054353 |
| 8 | 16434824 |
| 9 | 131478591 |
| 10 | 1051828726 |
| 11 | 8414629805 |
| 12 | 67317038436 |
| 13 | 538536307483 |
| 14 | 4308290459858 |
| 15 | 34466323678857 |
| 16 | 275730589430848 |
| 17 | 2205844715446775 |
| 18 | 17646757723574190 |
| 19 | 141174061788593509 |
| 20 | 1129392494308748060 |
[7,62,501,4012,32099,256794,2054353,16434824, 131478591,1051828726,8414629805,67317038436, 538536307483,4308290459858,34466323678857, 275730589430848,2205844715446775, 17646757723574190,141174061788593509, 1129392494308748060] |