The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 25 |
| 1 | 51 |
| 2 | 2575 |
| 3 | 5201 |
| 4 | 262625 |
| 5 | 530451 |
| 6 | 26785175 |
| 7 | 54100801 |
| 8 | 2731825225 |
| 9 | 5517751251 |
| 10 | 278619387775 |
| 11 | 562756526801 |
| 12 | 28416445727825 |
| 13 | 57395647982451 |
| 14 | 2898198844850375 |
| 15 | 5853793337683201 |
| 16 | 295587865729010425 |
| 17 | 597029524795704051 |
[25,51,2575,5201,262625,530451,26785175,54100801, 2731825225,5517751251,278619387775,562756526801, 28416445727825,57395647982451,2898198844850375, 5853793337683201,295587865729010425, 597029524795704051] |