The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 253 |
| 3 | 55611 |
| 4 | 9876790 |
| 5 | 1543206790 |
| 6 | 222222111111 |
| 7 | 30246911419753 |
| 8 | 3950617249382716 |
| 9 | 499999999500000000 |
| 10 | 51015202530354045509590858075706560555 |
| 11 | 617283950617283950617716049382716049382716 |
[1,253,55611,9876790,1543206790,222222111111, 30246911419753,3950617249382716, 499999999500000000, 51015202530354045509590858075706560555, 617283950617283950617716049382716049382716] |