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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 4 |
| 3 | 160421289 |
| 4 | 301341514055753 |
| 5 | 212759983293659858532 |
| 6 | 105067580130605231781256012 |
| 7 | 42603172007898715981922337319015 |
| 8 | 14954884176034777008243661081645101440 |
| 9 | 4653866336699333619983205123375833231719464 |
| 10 | 1302561543355459585313305069725405805940542534756 |
[0,4,160421289,301341514055753, 212759983293659858532,105067580130605231781256012, 42603172007898715981922337319015, 14954884176034777008243661081645101440, 4653866336699333619983205123375833231719464, 1302561543355459585313305069725405805940542534756] |