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| n | a(n) |
|---|---|
| 1 | 216 |
| 2 | 771 |
| 3 | 20115 |
| 4 | 426359 |
| 5 | 9685063 |
| 6 | 216562815 |
| 7 | 4867038759 |
| 8 | 109246101385 |
| 9 | 2453094910375 |
| 10 | 55078160026621 |
| 11 | 1236680655855829 |
| 12 | 27767207466078683 |
| 13 | 623458974380912329 |
| 14 | 13998557054872762899 |
| 15 | 314310396038821269603 |
[216,771,20115,426359,9685063,216562815, 4867038759,109246101385,2453094910375, 55078160026621,1236680655855829,27767207466078683, 623458974380912329,13998557054872762899, 314310396038821269603] |