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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 3 |
| 3 | 15 |
| 4 | 339 |
| 5 | 36427 |
| 6 | 13096963 |
| 7 | 15873640451 |
| 8 | 62445564860451 |
| 9 | 798259949414744783 |
| 10 | 33068961752607200944323 |
| 11 | 4440858995726701710188116927 |
| 12 | 1932894955335199186084241506391523 |
| 13 | 2726827087399738240677114437220214753751 |
| 14 | 12468408636701355648750341837415268166509266259 |
[0,3,15,339,36427,13096963,15873640451, 62445564860451,798259949414744783, 33068961752607200944323, 4440858995726701710188116927, 1932894955335199186084241506391523, 2726827087399738240677114437220214753751, 12468408636701355648750341837415268166509266259] |