| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 6 |
| 3 | 18 |
| 4 | 42 |
| 5 | 66 |
| 6 | 144 |
| 7 | 282 |
| 8 | 384 |
| 9 | 408 |
| 10 | 450 |
| 11 | 522 |
| 12 | 564 |
| 13 | 618 |
| 14 | 672 |
| 15 | 720 |
| 16 | 732 |
| 17 | 744 |
| 18 | 828 |
| 19 | 858 |
| 20 | 1122 |
| 21 | 1308 |
| 22 | 1374 |
| 23 | 1560 |
| 24 | 1644 |
| 25 | 1698 |
| 26 | 1776 |
| 27 | 1848 |
| 28 | 1920 |
| 29 | 2022 |
| 30 | 2304 |
| 31 | 2412 |
| 32 | 2616 |
| 33 | 2766 |
| 34 | 2778 |
| 35 | 2874 |
| 36 | 2958 |
| 37 | 2970 |
| 38 | 3036 |
| 39 | 3042 |
| 40 | 3240 |
| 41 | 3258 |
| 42 | 3354 |
| 43 | 3360 |
| 44 | 3432 |
| 45 | 3540 |
| 46 | 3594 |
| 47 | 3732 |
[4,6,18,42,66,144,282,384,408,450,522,564,618,672, 720,732,744,828,858,1122,1308,1374,1560,1644,1698, 1776,1848,1920,2022,2304,2412,2616,2766,2778,2874, 2958,2970,3036,3042,3240,3258,3354,3360,3432,3540, 3594,3732] |