| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 17 |
| 3 | 224 |
| 4 | 5362 |
| 5 | 224640 |
| 6 | 16823812 |
| 7 | 2239265280 |
| 8 | 532844962952 |
| 9 | 226169896329216 |
| 10 | 171735135418632976 |
| 11 | 232966965220983791616 |
| 12 | 565591167958003196615968 |
| 13 | 2455196078535760615522467840 |
[2,17,224,5362,224640,16823812,2239265280, 532844962952,226169896329216,171735135418632976, 232966965220983791616,565591167958003196615968, 2455196078535760615522467840] |