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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 19 |
| 3 | 352 |
| 4 | 9885 |
| 5 | 374486 |
| 6 | 17907991 |
| 7 | 1035748260 |
| 8 | 70334590969 |
| 9 | 5487022612810 |
| 10 | 483655093883451 |
| 11 | 47541690024105608 |
| 12 | 5156503816883562325 |
| 13 | 611769291578643110238 |
| 14 | 78812382009451814165695 |
| 15 | 10956572374811382997014796 |
| 16 | 1634950184384280878142249969 |
| 17 | 260653481562714033459279871250 |
[1,2,19,352,9885,374486,17907991,1035748260, 70334590969,5487022612810,483655093883451, 47541690024105608,5156503816883562325, 611769291578643110238,78812382009451814165695, 10956572374811382997014796, 1634950184384280878142249969, 260653481562714033459279871250] |