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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 264 |
| 3 | 376594 |
| 4 | 15351085 |
| 5 | 387076338 |
| 6 | 7883014615 |
| 7 | 140913280266 |
| 8 | 2326415367317 |
| 9 | 36332244115510 |
| 10 | 545100865508798 |
| 11 | 7936175643012759 |
| 12 | 112838485787858089 |
| 13 | 1574294739609758663 |
| 14 | 21624782468994463462 |
| 15 | 293202298856554538798 |
[0,264,376594,15351085,387076338,7883014615, 140913280266,2326415367317,36332244115510, 545100865508798,7936175643012759, 112838485787858089,1574294739609758663, 21624782468994463462,293202298856554538798] |