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| n | a(n) |
|---|---|
| 1 | 5 |
| 2 | 41 |
| 3 | 291 |
| 4 | 2069 |
| 5 | 14811 |
| 6 | 105913 |
| 7 | 757305 |
| 8 | 5415209 |
| 9 | 38722037 |
| 10 | 276885777 |
| 11 | 1979899795 |
| 12 | 14157473937 |
| 13 | 101234450215 |
| 14 | 723887182917 |
| 15 | 5176228570197 |
| 16 | 37013146305509 |
| 17 | 264666248964889 |
| 18 | 1892522801570497 |
| 19 | 13532675845407459 |
| 20 | 96766768350125913 |
[5,41,291,2069,14811,105913,757305,5415209, 38722037,276885777,1979899795,14157473937, 101234450215,723887182917,5176228570197, 37013146305509,264666248964889,1892522801570497, 13532675845407459,96766768350125913] |