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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 216 |
| 3 | 35052 |
| 4 | 3062214 |
| 5 | 281740616 |
| 6 | 26096227960 |
| 7 | 2412390974650 |
| 8 | 223089594072370 |
| 9 | 20629925261099416 |
| 10 | 1907729918140906612 |
| 11 | 176415244360852716250 |
| 12 | 16313809796506210420328 |
| 13 | 1508601933663945808015846 |
[0,216,35052,3062214,281740616,26096227960, 2412390974650,223089594072370,20629925261099416, 1907729918140906612,176415244360852716250, 16313809796506210420328,1508601933663945808015846] |