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| n | a(n) |
|---|---|
| 2 | 2 |
| 3 | 19 |
| 4 | 19 |
| 5 | 577 |
| 6 | 7417 |
| 7 | 114229 |
| 8 | 2053313 |
| 9 | 42373937 |
| 10 | 987654103 |
| 11 | 25678048763 |
| 12 | 736867805209 |
| 13 | 23136292864193 |
| 14 | 789018236128391 |
| 15 | 29043982525257901 |
| 16 | 1147797409030815779 |
| 17 | 48471109094902530293 |
| 18 | 2178347851919531491093 |
| 19 | 103805969587115219167613 |
| 20 | 5228356786703601108008083 |
[2,19,19,577,7417,114229,2053313,42373937, 987654103,25678048763,736867805209,23136292864193, 789018236128391,29043982525257901, 1147797409030815779,48471109094902530293, 2178347851919531491093,103805969587115219167613, 5228356786703601108008083] |