The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 5 |
| 2 | 57 |
| 3 | 299 |
| 4 | 2223 |
| 5 | 16949 |
| 6 | 119487 |
| 7 | 869434 |
| 8 | 6327405 |
| 9 | 45825170 |
| 10 | 332648911 |
| 11 | 2414803873 |
| 12 | 17522373803 |
| 13 | 127164315152 |
| 14 | 922879040046 |
| 15 | 6697507656945 |
| 16 | 48605408464469 |
| 17 | 352741515035141 |
| 18 | 2559929316113824 |
| 19 | 18578023371928916 |
| 20 | 134825191242742049 |
[5,57,299,2223,16949,119487,869434,6327405, 45825170,332648911,2414803873,17522373803, 127164315152,922879040046,6697507656945, 48605408464469,352741515035141,2559929316113824, 18578023371928916,134825191242742049] |