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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 4100 |
| 3 | 797175 |
| 4 | 33554464 |
| 5 | 610351625 |
| 6 | 6530347116 |
| 7 | 48444505375 |
| 8 | 274877907200 |
| 9 | 1270932914529 |
| 10 | 5000000000500 |
| 11 | 17261356072631 |
| 12 | 53496602690400 |
| 13 | 151437553297225 |
| 14 | 396857386628444 |
| 15 | 973097534181375 |
| 16 | 2251799813687296 |
| 17 | 4952289016455425 |
| 18 | 10411482432838500 |
[0,1,4100,797175,33554464,610351625,6530347116, 48444505375,274877907200,1270932914529, 5000000000500,17261356072631,53496602690400, 151437553297225,396857386628444,973097534181375, 2251799813687296,4952289016455425, 10411482432838500] |