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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 5 |
| 2 | 58 |
| 3 | 864 |
| 4 | 14532 |
| 5 | 262644 |
| 6 | 4977800 |
| 7 | 97575176 |
| 8 | 1961361993 |
| 9 | 40200713991 |
| 10 | 836868065805 |
| 11 | 17643727208475 |
| 12 | 375932890593208 |
| 13 | 8081825426016234 |
| 14 | 175078871453866363 |
| 15 | 3818046005021353980 |
| 16 | 83747799012137460437 |
| 17 | 1846442940744222053799 |
| 18 | 40896246043951637989485 |
| 19 | 909514786452244849526786 |
[1,5,58,864,14532,262644,4977800,97575176, 1961361993,40200713991,836868065805, 17643727208475,375932890593208,8081825426016234, 175078871453866363,3818046005021353980, 83747799012137460437,1846442940744222053799, 40896246043951637989485,909514786452244849526786] |