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| n | a(n) |
|---|---|
| 2 | 1 |
| 3 | 18980 |
| 4 | 8782833 |
| 5 | 4190083085 |
| 6 | 2848083212818 |
| 7 | 1738936046774850 |
| 8 | 1033232532941136255 |
| 9 | 621423541447699842468 |
| 10 | 373334515946952014204102 |
| 11 | 223802065032649969887333948 |
| 12 | 134170413630013820290109500226 |
| 13 | 80436114451156297907062202392494 |
| 14 | 48216986287603185632341666866663007 |
[1,18980,8782833,4190083085,2848083212818, 1738936046774850,1033232532941136255, 621423541447699842468,373334515946952014204102, 223802065032649969887333948, 134170413630013820290109500226, 80436114451156297907062202392494, 48216986287603185632341666866663007] |