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| n | a(n) |
|---|---|
| 0 | 1771561 |
| 1 | 148035889 |
| 2 | 1838265625 |
| 3 | 10779215329 |
| 4 | 42180533641 |
| 5 | 128100283921 |
| 6 | 326940373369 |
| 7 | 735091890625 |
| 8 | 1500730351849 |
| 9 | 2839760855281 |
| 10 | 5053913144281 |
| 11 | 8550986578849 |
| 12 | 13867245015625 |
| 13 | 21691961596369 |
[1771561,148035889,1838265625,10779215329, 42180533641,128100283921,326940373369, 735091890625,1500730351849,2839760855281, 5053913144281,8550986578849,13867245015625, 21691961596369] |