The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 63 |
| 2 | 4393 |
| 3 | 270671 |
| 4 | 15482441 |
| 5 | 860394281 |
| 6 | 47194836429 |
| 7 | 2576820346901 |
| 8 | 140374233864007 |
| 9 | 7641515368274447 |
| 10 | 415803711072157063 |
| 11 | 22623254269724301899 |
| 12 | 1230788116725572552851 |
| 13 | 66958898245049949164997 |
[63,4393,270671,15482441,860394281,47194836429, 2576820346901,140374233864007,7641515368274447, 415803711072157063,22623254269724301899, 1230788116725572552851,66958898245049949164997] |