The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 19 |
| 2 | 33 |
| 3 | 51 |
| 4 | 81 |
| 5 | 179 |
| 6 | 289 |
| 7 | 467 |
| 8 | 1041 |
| 9 | 1683 |
| 10 | 2721 |
| 11 | 6067 |
| 12 | 9809 |
| 13 | 15859 |
| 14 | 35361 |
| 15 | 57171 |
| 16 | 92433 |
| 17 | 206099 |
| 18 | 333217 |
| 19 | 538739 |
| 20 | 1201233 |
| 21 | 1942131 |
| 22 | 3140001 |
| 23 | 7001299 |
| 24 | 11319569 |
| 25 | 18301267 |
| 26 | 40806561 |
| 27 | 65975283 |
| 28 | 106667601 |
| 29 | 237838067 |
| 30 | 384532129 |
| 31 | 621704339 |
[19,33,51,81,179,289,467,1041,1683,2721,6067,9809, 15859,35361,57171,92433,206099,333217,538739, 1201233,1942131,3140001,7001299,11319569,18301267, 40806561,65975283,106667601,237838067,384532129, 621704339] |