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| n | a(n) |
|---|---|
| 8 | 1 |
| 9 | 366 |
| 10 | 55650 |
| 11 | 5493004 |
| 12 | 423998498 |
| 13 | 28236562692 |
| 14 | 1719625254528 |
| 15 | 99364697625603 |
| 16 | 5581585635090040 |
| 17 | 309848573192308938 |
| 18 | 17191725056094651066 |
| 19 | 960908576231662848594 |
| 20 | 54403314773991195041214 |
| 21 | 3132006013784614723699158 |
| 22 | 183841318769012678798846646 |
| 23 | 11022935912713058281592718756 |
[1,366,55650,5493004,423998498,28236562692, 1719625254528,99364697625603,5581585635090040, 309848573192308938,17191725056094651066, 960908576231662848594,54403314773991195041214, 3132006013784614723699158, 183841318769012678798846646, 11022935912713058281592718756] |