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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 4 |
| 3 | 0 |
| 4 | 90 |
| 5 | 675 |
| 6 | 1134 |
| 7 | 6318 |
| 8 | 4374 |
| 9 | 32805 |
| 10 | 255879 |
| 11 | 1003833 |
| 12 | 531441 |
| 13 | 327544803 |
| 14 | 20751953125 |
| 15 | 225830078125 |
| 16 | 91552734375 |
| 17 | 1068115234375 |
| 18 | 23651123046875 |
| 19 | 316619873046875 |
| 20 | 1697540283203125 |
| 21 | 13256072998046875 |
| 22 | 85353851318359375 |
| 23 | 541210174560546875 |
| 24 | 4518032073974609375 |
| 25 | 58233737945556640625 |
[0,4,0,90,675,1134,6318,4374,32805,255879,1003833, 531441,327544803,20751953125,225830078125, 91552734375,1068115234375,23651123046875, 316619873046875,1697540283203125, 13256072998046875,85353851318359375, 541210174560546875,4518032073974609375, 58233737945556640625] |