| n | a(n) |
|---|---|
| 1 | 21 |
| 2 | 42 |
| 3 | 43 |
| 4 | 49 |
| 5 | 69 |
| 6 | 77 |
| 7 | 84 |
| 8 | 86 |
| 9 | 87 |
| 10 | 98 |
| 11 | 99 |
| 12 | 105 |
| 13 | 138 |
| 14 | 139 |
| 15 | 145 |
| 16 | 154 |
| 17 | 155 |
| 18 | 161 |
| 19 | 165 |
| 20 | 168 |
| 21 | 172 |
| 22 | 174 |
| 23 | 175 |
| 24 | 181 |
| 25 | 196 |
| 26 | 198 |
| 27 | 199 |
| 28 | 210 |
| 29 | 211 |
| 30 | 217 |
| 31 | 221 |
| 32 | 237 |
| 33 | 276 |
| 34 | 278 |
| 35 | 279 |
| 36 | 290 |
| 37 | 291 |
| 38 | 297 |
| 39 | 308 |
| 40 | 310 |
| 41 | 311 |
| 42 | 322 |
| 43 | 323 |
| 44 | 329 |
| 45 | 330 |
| 46 | 331 |
| 47 | 336 |
| 48 | 337 |
| 49 | 344 |
| 50 | 348 |
| 51 | 350 |
| 52 | 351 |
| 53 | 357 |
| 54 | 362 |
| 55 | 363 |
[21,42,43,49,69,77,84,86,87,98,99,105,138,139,145, 154,155,161,165,168,172,174,175,181,196,198,199, 210,211,217,221,237,276,278,279,290,291,297,308, 310,311,322,323,329,330,331,336,337,344,348,350, 351,357,362,363] |