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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 5 |
| 2 | 46 |
| 3 | 517 |
| 4 | 6376 |
| 5 | 82994 |
| 6 | 1119210 |
| 7 | 15475205 |
| 8 | 217994860 |
| 9 | 3115374880 |
| 10 | 45035696036 |
| 11 | 657153097330 |
| 12 | 9663914317396 |
| 13 | 143050882063262 |
| 14 | 2129448324373546 |
| 15 | 31853280798384645 |
| 16 | 478503774600509620 |
| 17 | 7215090439396842572 |
| 18 | 109154411037070011504 |
| 19 | 1656268648035559711392 |
[1,5,46,517,6376,82994,1119210,15475205,217994860, 3115374880,45035696036,657153097330,9663914317396, 143050882063262,2129448324373546, 31853280798384645,478503774600509620, 7215090439396842572,109154411037070011504, 1656268648035559711392] |