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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 31 |
| 3 | 991 |
| 4 | 48873 |
| 5 | 3276921 |
| 6 | 278486359 |
| 7 | 28694553119 |
| 8 | 3476833863281 |
| 9 | 484490228040865 |
| 10 | 76339085661865791 |
| 11 | 13421203354104200271 |
| 12 | 2604724304171427849145 |
| 13 | 553128917492225243766065 |
| 14 | 127578750880241791377948359 |
| 15 | 31761039697155404251033218751 |
| 16 | 8488557258448512769356828810849 |
[1,2,31,991,48873,3276921,278486359,28694553119, 3476833863281,484490228040865,76339085661865791, 13421203354104200271,2604724304171427849145, 553128917492225243766065, 127578750880241791377948359, 31761039697155404251033218751, 8488557258448512769356828810849] |