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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 7 |
| 2 | 109 |
| 3 | 2347 |
| 4 | 59161 |
| 5 | 1630447 |
| 6 | 47569789 |
| 7 | 1443991003 |
| 8 | 45131425129 |
| 9 | 1442569728607 |
| 10 | 46937386025509 |
| 11 | 1549447085182003 |
| 12 | 51764874058957801 |
| 13 | 1746923396870038303 |
| 14 | 59463803615708931709 |
| 15 | 2039212029425398630747 |
| 16 | 70386791601625688812009 |
| 17 | 2443437949352620443258463 |
| 18 | 85253533514289277890811669 |
[1,7,109,2347,59161,1630447,47569789,1443991003, 45131425129,1442569728607,46937386025509, 1549447085182003,51764874058957801, 1746923396870038303,59463803615708931709, 2039212029425398630747,70386791601625688812009, 2443437949352620443258463, 85253533514289277890811669] |