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| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 15 |
| 3 | 21 |
| 4 | 26 |
| 5 | 27 |
| 6 | 28 |
| 7 | 33 |
| 8 | 38 |
| 9 | 48 |
| 10 | 50 |
| 11 | 57 |
| 12 | 62 |
| 13 | 69 |
| 14 | 72 |
| 15 | 74 |
| 16 | 80 |
| 17 | 85 |
| 18 | 93 |
| 19 | 99 |
| 20 | 106 |
| 21 | 129 |
| 22 | 133 |
| 23 | 134 |
| 24 | 145 |
| 25 | 156 |
| 26 | 166 |
| 27 | 176 |
| 28 | 177 |
| 29 | 178 |
| 30 | 200 |
| 31 | 205 |
| 32 | 207 |
| 33 | 213 |
| 34 | 217 |
| 35 | 218 |
| 36 | 226 |
| 37 | 237 |
| 38 | 249 |
| 39 | 253 |
| 40 | 254 |
| 41 | 262 |
| 42 | 265 |
| 43 | 276 |
| 44 | 278 |
| 45 | 308 |
| 46 | 309 |
| 47 | 314 |
| 48 | 348 |
| 49 | 362 |
| 50 | 364 |
| 51 | 368 |
| 52 | 380 |
| 53 | 393 |
| 54 | 398 |
| 55 | 410 |
| 56 | 417 |
[4,15,21,26,27,28,33,38,48,50,57,62,69,72,74,80, 85,93,99,106,129,133,134,145,156,166,176,177,178, 200,205,207,213,217,218,226,237,249,253,254,262, 265,276,278,308,309,314,348,362,364,368,380,393, 398,410,417] |