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| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 6 |
| 3 | 22 |
| 4 | 202 |
| 5 | 262 |
| 6 | 454 |
| 7 | 626 |
| 8 | 818 |
| 9 | 838 |
| 10 | 878 |
| 11 | 898 |
| 12 | 20302 |
| 13 | 20602 |
| 14 | 22322 |
| 15 | 22522 |
| 16 | 22622 |
| 17 | 22822 |
| 18 | 24142 |
| 19 | 24842 |
| 20 | 26662 |
| 21 | 26762 |
| 22 | 28682 |
| 23 | 41014 |
| 24 | 41414 |
| 25 | 41614 |
| 26 | 41714 |
| 27 | 43034 |
| 28 | 43234 |
| 29 | 43534 |
| 30 | 43634 |
| 31 | 45454 |
| 32 | 45554 |
| 33 | 45754 |
| 34 | 47074 |
| 35 | 47374 |
| 36 | 47774 |
| 37 | 49094 |
| 38 | 49394 |
[4,6,22,202,262,454,626,818,838,878,898,20302, 20602,22322,22522,22622,22822,24142,24842,26662, 26762,28682,41014,41414,41614,41714,43034,43234, 43534,43634,45454,45554,45754,47074,47374,47774, 49094,49394] |