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| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 31 |
| 3 | 3156 |
| 4 | 826699 |
| 5 | 285312497310 |
| 6 | 303160419089563 |
| 7 | 827240565046755853740 |
| 8 | 1979246896225360344977719 |
| 9 | 20880469979094808259715377888286 |
| 10 | 2567686153182091604540923022990731504371755 |
[4,31,3156,826699,285312497310,303160419089563, 827240565046755853740,1979246896225360344977719, 20880469979094808259715377888286, 2567686153182091604540923022990731504371755] |