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| n | a(n) |
|---|---|
| 1 | 7 |
| 2 | 59 |
| 3 | 483 |
| 4 | 3841 |
| 5 | 30599 |
| 6 | 243953 |
| 7 | 1945103 |
| 8 | 15508803 |
| 9 | 123654745 |
| 10 | 985923281 |
| 11 | 7860958915 |
| 12 | 62676962321 |
| 13 | 499735676361 |
| 14 | 3984490261291 |
| 15 | 31769119935801 |
| 16 | 253301405031061 |
| 17 | 2019621630078545 |
| 18 | 16102838151192633 |
| 19 | 128391077151131153 |
[7,59,483,3841,30599,243953,1945103,15508803, 123654745,985923281,7860958915,62676962321, 499735676361,3984490261291,31769119935801, 253301405031061,2019621630078545, 16102838151192633,128391077151131153] |