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| n | a(n) |
|---|---|
| 2 | 1 |
| 3 | 3 |
| 4 | 222 |
| 5 | 7810 |
| 6 | 245715 |
| 7 | 7887621 |
| 8 | 271336828 |
| 9 | 9598223664 |
| 10 | 323149486005 |
| 11 | 9653120522639 |
| 12 | 265199107509930 |
| 13 | 6875831133411318 |
| 14 | 170878889034103705 |
| 15 | 4105071237469192095 |
| 16 | 95749849725794169816 |
| 17 | 2169082695217727013712 |
[1,3,222,7810,245715,7887621,271336828,9598223664, 323149486005,9653120522639,265199107509930, 6875831133411318,170878889034103705, 4105071237469192095,95749849725794169816, 2169082695217727013712] |