| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 55 |
| 3 | 121771 |
| 4 | 5720653 |
| 5 | 12625478965 |
| 6 | 593128762435 |
| 7 | 1309034909945503 |
| 8 | 61496776341083161 |
| 9 | 135723357520344181225 |
| 10 | 6376108764003055554511 |
| 11 | 14072069153115290487843091 |
| 12 | 661087708807868029661744485 |
| 13 | 1459020273797576190840203197981 |
| 14 | 68542895818241264287385936157403 |
[1,55,121771,5720653,12625478965,593128762435, 1309034909945503,61496776341083161, 135723357520344181225,6376108764003055554511, 14072069153115290487843091, 661087708807868029661744485, 1459020273797576190840203197981, 68542895818241264287385936157403] |