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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 48 |
| 2 | 3840 |
| 3 | 86016 |
| 4 | 983040 |
| 5 | 34603008 |
| 6 | 22900899840 |
| 7 | 805306368 |
| 8 | 1095216660480 |
| 9 | 27419071217664 |
| 10 | 181419418583040 |
| 11 | 1213860837064704 |
| 12 | 384213343210045440 |
| 13 | 13510798882111488 |
| 14 | 31345053406498652160 |
[1,48,3840,86016,983040,34603008,22900899840, 805306368,1095216660480,27419071217664, 181419418583040,1213860837064704, 384213343210045440,13510798882111488, 31345053406498652160] |