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| n | a(n) |
|---|---|
| 1 | 125 |
| 2 | 724 |
| 3 | 4800 |
| 4 | 30920 |
| 5 | 199512 |
| 6 | 1285960 |
| 7 | 8289288 |
| 8 | 53433608 |
| 9 | 344449224 |
| 10 | 2220470152 |
| 11 | 14314275912 |
| 12 | 92277661448 |
| 13 | 594874191816 |
| 14 | 3834903188104 |
| 15 | 24722024949576 |
| 16 | 159372675116552 |
| 17 | 1027409972582088 |
| 18 | 6623289504223624 |
| 19 | 42697625485315656 |
[125,724,4800,30920,199512,1285960,8289288, 53433608,344449224,2220470152,14314275912, 92277661448,594874191816,3834903188104, 24722024949576,159372675116552,1027409972582088, 6623289504223624,42697625485315656] |