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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 5 |
| 3 | 30 |
| 4 | 229 |
| 5 | 1938 |
| 6 | 17530 |
| 7 | 165852 |
| 8 | 1621133 |
| 9 | 16242474 |
| 10 | 165923854 |
| 11 | 1721675460 |
| 12 | 18095802306 |
| 13 | 192256162740 |
| 14 | 2061367432212 |
| 15 | 22276538889912 |
| 16 | 242387718986301 |
| 17 | 2653259550491034 |
| 18 | 29198054511893638 |
| 19 | 322835545567447092 |
| 20 | 3584671507685675894 |
| 21 | 39955514234936341980 |
| 22 | 446897274497509974508 |
[1,5,30,229,1938,17530,165852,1621133,16242474, 165923854,1721675460,18095802306,192256162740, 2061367432212,22276538889912,242387718986301, 2653259550491034,29198054511893638, 322835545567447092,3584671507685675894, 39955514234936341980,446897274497509974508] |