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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 73 |
| 3 | 2163 |
| 4 | 75001 |
| 5 | 2835003 |
| 6 | 113329945 |
| 7 | 4711519347 |
| 8 | 201638246905 |
| 9 | 8824346685003 |
| 10 | 393088036809073 |
| 11 | 17764622316152715 |
| 12 | 812477640612743977 |
| 13 | 37535247213943518315 |
| 14 | 1749047441756088054073 |
| 15 | 82108960863923963522163 |
| 16 | 3879675478363506548275705 |
[1,3,73,2163,75001,2835003,113329945,4711519347, 201638246905,8824346685003,393088036809073, 17764622316152715,812477640612743977, 37535247213943518315,1749047441756088054073, 82108960863923963522163,3879675478363506548275705] |