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| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 42 |
| 3 | 813 |
| 4 | 22518 |
| 5 | 811368 |
| 6 | 35946075 |
| 7 | 1888624971 |
| 8 | 114746269757 |
| 9 | 7912720985079 |
| 10 | 610470884770406 |
| 11 | 52094956940751710 |
| 12 | 4871691779130290166 |
| 13 | 495409898474358881326 |
| 14 | 54427906182810588386673 |
| 15 | 6424384909407981686846705 |
| 16 | 810777549111969648699638306 |
| 17 | 108944087230453697240059783283 |
[4,42,813,22518,811368,35946075,1888624971, 114746269757,7912720985079,610470884770406, 52094956940751710,4871691779130290166, 495409898474358881326,54427906182810588386673, 6424384909407981686846705, 810777549111969648699638306, 108944087230453697240059783283] |