The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 15 |
| 2 | 55 |
| 3 | 87 |
| 4 | 95 |
| 5 | 143 |
| 6 | 255 |
| 7 | 303 |
| 8 | 447 |
| 9 | 551 |
| 10 | 735 |
| 11 | 1007 |
| 12 | 1295 |
| 13 | 2103 |
| 14 | 2407 |
| 15 | 3495 |
| 16 | 5447 |
| 17 | 5727 |
[15,55,87,95,143,255,303,447,551,735,1007,1295, 2103,2407,3495,5447,5727] |