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| n | a(n) |
|---|---|
| 0 | 8 |
| 1 | 567 |
| 2 | 28160 |
| 3 | 1333584 |
| 4 | 62723375 |
| 5 | 2947166208 |
| 6 | 138457523672 |
| 7 | 6504579992295 |
| 8 | 305576963500544 |
| 9 | 14355613810692000 |
| 10 | 674408279720748383 |
| 11 | 31682833585030397952 |
| 12 | 1488418770572887642280 |
| 13 | 69923999385781980681879 |
| 14 | 3284939552377913067968000 |
| 15 | 154322234962490820966855408 |
[8,567,28160,1333584,62723375,2947166208, 138457523672,6504579992295,305576963500544, 14355613810692000,674408279720748383, 31682833585030397952,1488418770572887642280, 69923999385781980681879,3284939552377913067968000, 154322234962490820966855408] |