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| n | a(n) |
|---|---|
| 3 | 3 |
| 4 | 16 |
| 5 | 250 |
| 6 | 8496 |
| 7 | 540568 |
| 8 | 61672192 |
| 9 | 12608406288 |
| 10 | 4697459302400 |
| 11 | 3256012245850496 |
| 12 | 4276437400678311936 |
| 13 | 10796431791679078528256 |
| 14 | 52955364458428847588956160 |
| 15 | 508511231062550463852707804160 |
| 16 | 9611398894866376672902234634977280 |
[3,16,250,8496,540568,61672192,12608406288, 4697459302400,3256012245850496, 4276437400678311936,10796431791679078528256, 52955364458428847588956160, 508511231062550463852707804160, 9611398894866376672902234634977280] |