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| n | a(n) |
|---|---|
| 0 | 3 |
| 1 | 3 |
| 2 | 3 |
| 3 | 6 |
| 4 | 15 |
| 5 | 87 |
| 6 | 1299 |
| 7 | 112998 |
| 8 | 146784315 |
| 9 | 16586334025071 |
| 10 | 2434613678231239448367 |
| 11 | 40381315689150066251526220641224742 |
| 12 | 98312903521778500654864668915856114278134197773017871243 |
[3,3,3,6,15,87,1299,112998,146784315, 16586334025071,2434613678231239448367, 40381315689150066251526220641224742, 98312903521778500654864668915856114278134197773017\ 871243] |