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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 10 |
| 2 | 200 |
| 3 | 400 |
| 4 | 16000 |
| 5 | 800000 |
| 6 | 16000000 |
| 7 | 160000000 |
| 8 | 2560000000 |
| 9 | 25600000000 |
| 10 | 2560000000000 |
| 11 | 25600000000000 |
| 12 | 1024000000000000 |
| 13 | 409600000000000 |
| 14 | 8192000000000000 |
| 15 | 409600000000000000 |
| 16 | 65536000000000000000 |
| 17 | 655360000000000000000 |
| 18 | 2621440000000000000000 |
| 19 | 26214400000000000000000 |
| 20 | 5242880000000000000000000 |
| 21 | 52428800000000000000000000 |
[1,10,200,400,16000,800000,16000000,160000000, 2560000000,25600000000,2560000000000, 25600000000000,1024000000000000,409600000000000, 8192000000000000,409600000000000000, 65536000000000000000,655360000000000000000, 2621440000000000000000,26214400000000000000000, 5242880000000000000000000, 52428800000000000000000000] |