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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 5 |
| 2 | 17 |
| 3 | 134 |
| 4 | 1333 |
| 5 | 14890 |
| 6 | 178394 |
| 7 | 2240268 |
| 8 | 29101197 |
| 9 | 387793090 |
| 10 | 5271628846 |
| 11 | 72818272852 |
| 12 | 1019157450818 |
| 13 | 14421479205284 |
| 14 | 205978607191508 |
| 15 | 2965567162041368 |
| 16 | 42994130150806077 |
| 17 | 627124332791860146 |
| 18 | 9196734644381065510 |
| 19 | 135516564162069215748 |
| 20 | 2005456310676742385910 |
[1,5,17,134,1333,14890,178394,2240268,29101197, 387793090,5271628846,72818272852,1019157450818, 14421479205284,205978607191508,2965567162041368, 42994130150806077,627124332791860146, 9196734644381065510,135516564162069215748, 2005456310676742385910] |