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| n | a(n) |
|---|---|
| 1 | 5 |
| 2 | 5 |
| 3 | 25 |
| 4 | 56 |
| 5 | 494 |
| 6 | 4991 |
| 7 | 62904 |
| 8 | 760671 |
| 9 | 8468941 |
| 10 | 90476206 |
| 11 | 850301770 |
| 12 | 7703098612 |
| 13 | 62160939006 |
| 14 | 482749236704 |
| 15 | 3416830587073 |
| 16 | 23238401292501 |
| 17 | 146883022822593 |
| 18 | 892090634118666 |
| 19 | 5108443008090443 |
| 20 | 28144017611172958 |
| 21 | 147708619212786406 |
[5,5,25,56,494,4991,62904,760671,8468941,90476206, 850301770,7703098612,62160939006,482749236704, 3416830587073,23238401292501,146883022822593, 892090634118666,5108443008090443, 28144017611172958,147708619212786406] |