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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 5 |
| 2 | 46 |
| 3 | 235 |
| 4 | 13206 |
| 5 | 66265 |
| 6 | 609591 |
| 7 | 3114220 |
| 8 | 175005911 |
| 9 | 878143775 |
| 10 | 8078299886 |
| 11 | 41269643205 |
| 12 | 2319178319366 |
| 13 | 11637161240035 |
| 14 | 107053629479681 |
| 15 | 546905308638440 |
| 16 | 30733750913232321 |
| 17 | 154215659874800045 |
| 18 | 1418674689786432726 |
| 19 | 7247589108806963675 |
[1,5,46,235,13206,66265,609591,3114220,175005911, 878143775,8078299886,41269643205,2319178319366, 11637161240035,107053629479681,546905308638440, 30733750913232321,154215659874800045, 1418674689786432726,7247589108806963675] |