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| n | a(n) |
|---|---|
| 0 | 16 |
| 1 | 185 |
| 2 | 2181 |
| 3 | 26860 |
| 4 | 342968 |
| 5 | 4504944 |
| 6 | 60509296 |
| 7 | 827456576 |
| 8 | 11482655232 |
| 9 | 161302619392 |
| 10 | 2289365653760 |
| 11 | 32780329073664 |
| 12 | 472951175022592 |
| 13 | 6869148315201536 |
| 14 | 100352220112662528 |
| 15 | 1473672361011920896 |
[16,185,2181,26860,342968,4504944,60509296, 827456576,11482655232,161302619392,2289365653760, 32780329073664,472951175022592,6869148315201536, 100352220112662528,1473672361011920896] |