The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 11 |
| 3 | 291 |
| 4 | 28661 |
| 5 | 10982565 |
| 6 | 16031828359 |
| 7 | 89373230342147 |
| 8 | 1904212088591018521 |
| 9 | 155026375803222057878889 |
| 10 | 48225130114674924906540348115 |
| 11 | 57322477811272486520770053115140403 |
| 12 | 260351257812272076026660518356378279922077 |
[1,11,291,28661,10982565,16031828359, 89373230342147,1904212088591018521, 155026375803222057878889, 48225130114674924906540348115, 57322477811272486520770053115140403, 260351257812272076026660518356378279922077] |