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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 7 |
| 2 | 61 |
| 3 | 601 |
| 4 | 6271 |
| 5 | 67507 |
| 6 | 741103 |
| 7 | 8246887 |
| 8 | 92686957 |
| 9 | 1049674417 |
| 10 | 11959331461 |
| 11 | 136924493965 |
| 12 | 1574023862761 |
| 13 | 18155939656561 |
| 14 | 210032393841961 |
| 15 | 2435799262392601 |
| 16 | 28310339109293791 |
| 17 | 329672626737907651 |
| 18 | 3845565982405069351 |
| 19 | 44926004138095063951 |
| 20 | 525567130559668000771 |
[1,7,61,601,6271,67507,741103,8246887,92686957, 1049674417,11959331461,136924493965,1574023862761, 18155939656561,210032393841961,2435799262392601, 28310339109293791,329672626737907651, 3845565982405069351,44926004138095063951, 525567130559668000771] |