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| n | a(n) |
|---|---|
| 1 | 5 |
| 2 | 31 |
| 3 | 194 |
| 4 | 1061 |
| 5 | 6456 |
| 6 | 40080 |
| 7 | 251721 |
| 8 | 1617206 |
| 9 | 10553419 |
| 10 | 69709769 |
| 11 | 465769825 |
[5,31,194,1061,6456,40080,251721,1617206,10553419, 69709769,465769825] |