The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 3 |
| 3 | 5 |
| 4 | 11 |
| 5 | 23 |
| 6 | 47 |
| 7 | 281 |
| 8 | 563 |
| 9 | 2251 |
| 10 | 22511 |
| 11 | 225109 |
| 12 | 450217 |
| 13 | 2701301 |
| 14 | 10805203 |
| 15 | 43220813 |
| 16 | 2333923901 |
| 17 | 18671391209 |
| 18 | 560141736269 |
| 19 | 5601417362689 |
| 20 | 22405669450757 |
| 21 | 448113389015141 |
| 22 | 3584907112121129 |
| 23 | 186415169830298707 |
[1,2,3,5,11,23,47,281,563,2251,22511,225109, 450217,2701301,10805203,43220813,2333923901, 18671391209,560141736269,5601417362689, 22405669450757,448113389015141,3584907112121129, 186415169830298707] |