The OEIS is supported by the many generous donors to the OEIS Foundation.
A120773 as a simple table
| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | -1 |
| 2 | 7 |
| 3 | 485 |
| 4 | 65455 |
| 5 | 33554189 |
| 6 | 68719476007 |
| 7 | 562949953419125 |
| 8 | 18446744073709545055 |
| 9 | 2417851639229258349392669 |
| 10 | 1267650600228229401496703146327 |
| 11 | 2658455991569831745807614120560512005 |
[0,-1,7,485,65455,33554189,68719476007, 562949953419125,18446744073709545055, 2417851639229258349392669, 1267650600228229401496703146327, 2658455991569831745807614120560512005] |