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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 30 |
| 2 | 589 |
| 3 | 9606 |
| 4 | 141469 |
| 5 | 1956918 |
| 6 | 25981309 |
| 7 | 335413254 |
| 8 | 4245767581 |
| 9 | 52992982614 |
| 10 | 654705201085 |
| 11 | 8028335357094 |
| 12 | 97906258582237 |
| 13 | 1189106856272118 |
| 14 | 14398317567128317 |
| 15 | 173947775018406726 |
| 16 | 2097931504239454237 |
| 17 | 25270527569760142230 |
| 18 | 304106756286138899005 |
[1,30,589,9606,141469,1956918,25981309,335413254, 4245767581,52992982614,654705201085,8028335357094, 97906258582237,1189106856272118,14398317567128317, 173947775018406726,2097931504239454237, 25270527569760142230,304106756286138899005] |