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| n | a(n) |
|---|---|
| 1 | 20 |
| 2 | 22 |
| 3 | 36 |
| 4 | 48 |
| 5 | 78 |
| 6 | 90 |
| 7 | 132 |
| 8 | 162 |
| 9 | 258 |
| 10 | 330 |
| 11 | 372 |
| 12 | 468 |
| 13 | 498 |
| 14 | 510 |
| 15 | 678 |
| 16 | 708 |
| 17 | 720 |
| 18 | 750 |
| 19 | 762 |
| 20 | 888 |
| 21 | 918 |
| 22 | 972 |
| 23 | 1098 |
| 24 | 1170 |
| 25 | 1212 |
| 26 | 1380 |
| 27 | 1560 |
| 28 | 1602 |
| 29 | 1758 |
| 30 | 1800 |
| 31 | 1980 |
| 32 | 2052 |
| 33 | 2178 |
| 34 | 2220 |
| 35 | 2358 |
| 36 | 2442 |
| 37 | 2472 |
| 38 | 2610 |
| 39 | 2682 |
| 40 | 2778 |
| 41 | 2862 |
[20,22,36,48,78,90,132,162,258,330,372,468,498, 510,678,708,720,750,762,888,918,972,1098,1170, 1212,1380,1560,1602,1758,1800,1980,2052,2178,2220, 2358,2442,2472,2610,2682,2778,2862] |