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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 38 |
| 3 | 2389 |
| 4 | 120908 |
| 5 | 5756974 |
| 6 | 267947653 |
| 7 | 12350550690 |
| 8 | 566789163488 |
| 9 | 25958450760849 |
| 10 | 1187754678765443 |
| 11 | 54322924296499637 |
| 12 | 2483989094275943631 |
| 13 | 113572728843260660640 |
| 14 | 5192525516036292143928 |
| 15 | 237396286736491907178433 |
[0,38,2389,120908,5756974,267947653,12350550690, 566789163488,25958450760849,1187754678765443, 54322924296499637,2483989094275943631, 113572728843260660640,5192525516036292143928, 237396286736491907178433] |