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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 55 |
| 4 | 571189 |
| 5 | 50984927470 |
| 6 | 23739529252540151 |
| 7 | 48305357301322263405109 |
| 8 | 370911274700550803678566199652 |
| 9 | 9515813289536524717883338564939648176 |
| 10 | 736766457419317377244512506283142581954316500 |
[0,0,55,571189,50984927470,23739529252540151, 48305357301322263405109, 370911274700550803678566199652, 9515813289536524717883338564939648176, 736766457419317377244512506283142581954316500] |