The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 263 |
| 3 | 4659 |
| 4 | 118489 |
| 5 | 8260441 |
| 6 | 408513208 |
| 7 | 18310081145 |
| 8 | 893274482801 |
| 9 | 43871509629713 |
| 10 | 2125306114047014 |
| 11 | 103023996018095153 |
| 12 | 5001737585430438515 |
| 13 | 242795570513177880054 |
| 14 | 11784713223275028672523 |
| 15 | 571987904595320449315439 |
[1,263,4659,118489,8260441,408513208,18310081145, 893274482801,43871509629713,2125306114047014, 103023996018095153,5001737585430438515, 242795570513177880054,11784713223275028672523, 571987904595320449315439] |