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| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 7 |
| 3 | 8 |
| 4 | 15 |
| 5 | 44 |
| 6 | 311 |
| 7 | 503 |
| 8 | 507 |
| 9 | 744 |
| 10 | 843 |
| 11 | 851 |
| 12 | 955 |
| 13 | 1164 |
| 14 | 1256 |
| 15 | 1287 |
| 16 | 1307 |
| 17 | 1312 |
| 18 | 2163 |
| 19 | 2171 |
| 20 | 2244 |
| 21 | 2247 |
| 22 | 2368 |
| 23 | 2412 |
| 24 | 3143 |
| 25 | 3160 |
| 26 | 3872 |
| 27 | 3875 |
| 28 | 3952 |
| 29 | 4584 |
| 30 | 5088 |
| 31 | 5236 |
| 32 | 5355 |
| 33 | 5364 |
| 34 | 5380 |
| 35 | 6211 |
| 36 | 6303 |
| 37 | 6307 |
| 38 | 6587 |
| 39 | 7243 |
| 40 | 7244 |
| 41 | 7436 |
| 42 | 7439 |
| 43 | 7860 |
| 44 | 8220 |
| 45 | 8268 |
| 46 | 9167 |
| 47 | 9283 |
| 48 | 9515 |
| 49 | 9519 |
| 50 | 9632 |
| 51 | 9692 |
| 52 | 9915 |
| 53 | 9919 |
[4,7,8,15,44,311,503,507,744,843,851,955,1164, 1256,1287,1307,1312,2163,2171,2244,2247,2368,2412, 3143,3160,3872,3875,3952,4584,5088,5236,5355,5364, 5380,6211,6303,6307,6587,7243,7244,7436,7439,7860, 8220,8268,9167,9283,9515,9519,9632,9692,9915,9919] |