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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 256 |
| 3 | 418 |
| 4 | 1612900 |
| 5 | 78633756 |
| 6 | 22466712321 |
| 7 | 2294073688498 |
| 8 | 399487764096100 |
| 9 | 51031822108216122 |
| 10 | 7730096571419434884 |
| 11 | 1061888266253693915768 |
| 12 | 154122481474602369093121 |
| 13 | 21681358901642544133423968 |
[0,256,418,1612900,78633756,22466712321, 2294073688498,399487764096100,51031822108216122, 7730096571419434884,1061888266253693915768, 154122481474602369093121, 21681358901642544133423968] |