The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 22 |
| 2 | 25 |
| 3 | 27 |
| 4 | 32 |
| 5 | 33 |
| 6 | 35 |
| 7 | 52 |
| 8 | 55 |
| 9 | 57 |
| 10 | 72 |
| 11 | 75 |
| 12 | 77 |
| 13 | 222 |
| 14 | 225 |
| 15 | 232 |
| 16 | 235 |
| 17 | 237 |
| 18 | 252 |
| 19 | 253 |
| 20 | 255 |
[22,25,27,32,33,35,52,55,57,72,75,77,222,225,232, 235,237,252,253,255] |