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| n | a(n) |
|---|---|
| 9 | 1 |
| 10 | 1103 |
| 11 | 269512 |
| 12 | 38643849 |
| 13 | 4218834608 |
| 14 | 393933602129 |
| 15 | 33499946915016 |
| 16 | 2693983725947891 |
| 17 | 209859823775671984 |
| 18 | 16093162912317174422 |
| 19 | 1228462028909579534968 |
| 20 | 94081283153407041089350 |
| 21 | 7269699339591280955315232 |
| 22 | 569088494101518607733459806 |
[1,1103,269512,38643849,4218834608,393933602129, 33499946915016,2693983725947891, 209859823775671984,16093162912317174422, 1228462028909579534968,94081283153407041089350, 7269699339591280955315232, 569088494101518607733459806] |