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| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 12 |
| 3 | 18 |
| 4 | 72 |
| 5 | 84 |
| 6 | 114 |
| 7 | 198 |
| 8 | 354 |
| 9 | 378 |
| 10 | 588 |
| 11 | 612 |
| 12 | 618 |
| 13 | 864 |
| 14 | 912 |
| 15 | 948 |
| 16 | 1032 |
| 17 | 1068 |
| 18 | 1134 |
| 19 | 1320 |
| 20 | 1410 |
| 21 | 1428 |
| 22 | 1452 |
| 23 | 1500 |
| 24 | 1830 |
| 25 | 1956 |
| 26 | 2046 |
| 27 | 2058 |
| 28 | 2172 |
| 29 | 2298 |
| 30 | 2448 |
| 31 | 2634 |
| 32 | 2748 |
| 33 | 2844 |
| 34 | 2856 |
| 35 | 3192 |
| 36 | 3246 |
| 37 | 3390 |
| 38 | 3474 |
| 39 | 3846 |
| 40 | 3906 |
| 41 | 4092 |
| 42 | 4182 |
| 43 | 4506 |
| 44 | 4842 |
| 45 | 4884 |
| 46 | 4890 |
[4,12,18,72,84,114,198,354,378,588,612,618,864, 912,948,1032,1068,1134,1320,1410,1428,1452,1500, 1830,1956,2046,2058,2172,2298,2448,2634,2748,2844, 2856,3192,3246,3390,3474,3846,3906,4092,4182,4506, 4842,4884,4890] |