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| n | a(n) |
|---|---|
| 1 | 8 |
| 2 | 128 |
| 3 | 1905 |
| 4 | 28248 |
| 5 | 420345 |
| 6 | 6256258 |
| 7 | 93109949 |
| 8 | 1385723098 |
| 9 | 20623265507 |
| 10 | 306929355068 |
| 11 | 4567929663745 |
| 12 | 67983009966484 |
| 13 | 1011769004146827 |
| 14 | 15057828687751316 |
| 15 | 224100761989675875 |
| 16 | 3335218680314293250 |
[8,128,1905,28248,420345,6256258,93109949, 1385723098,20623265507,306929355068,4567929663745, 67983009966484,1011769004146827,15057828687751316, 224100761989675875,3335218680314293250] |