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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 4 |
| 3 | 16 |
| 4 | 64 |
| 5 | 128 |
| 6 | 576 |
| 7 | 4608 |
| 8 | 16384 |
| 9 | 64000 |
| 10 | 640000 |
| 11 | 2560000 |
| 12 | 10240000 |
| 13 | 54080000 |
| 14 | 135200000 |
| 15 | 1554251776 |
| 16 | 24868028416 |
| 17 | 49736056832 |
| 18 | 557256278016 |
| 19 | 2244339564544 |
| 20 | 11075584000000 |
| 21 | 74331795750912 |
| 22 | 936622443986944 |
| 23 | 7492979551895552 |
| 24 | 85630228705050624 |
[2,4,16,64,128,576,4608,16384,64000,640000, 2560000,10240000,54080000,135200000,1554251776, 24868028416,49736056832,557256278016, 2244339564544,11075584000000,74331795750912, 936622443986944,7492979551895552, 85630228705050624] |