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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 4 |
| 4 | 11 |
| 5 | 12 |
| 6 | 21 |
| 7 | 26 |
| 8 | 42 |
| 9 | 46 |
| 10 | 121 |
| 11 | 162 |
| 12 | 276 |
| 13 | 421 |
| 14 | 474 |
| 15 | 642 |
| 16 | 1474 |
| 17 | 1621 |
| 18 | 1662 |
| 19 | 2162 |
| 20 | 2174 |
| 21 | 4174 |
| 22 | 4761 |
| 23 | 4762 |
| 24 | 4771 |
| 25 | 6424 |
| 26 | 6642 |
| 27 | 11142 |
| 28 | 16662 |
| 29 | 21621 |
| 30 | 24724 |
| 31 | 26724 |
| 32 | 27224 |
| 33 | 46121 |
| 34 | 47662 |
| 35 | 64162 |
| 36 | 64224 |
| 37 | 66424 |
| 38 | 161761 |
| 39 | 161776 |
| 40 | 166662 |
| 41 | 211462 |
| 42 | 214762 |
| 43 | 266771 |
| 44 | 267671 |
| 45 | 414261 |
| 46 | 421262 |
| 47 | 421621 |
| 48 | 462776 |
| 49 | 471462 |
| 50 | 471642 |
| 51 | 477224 |
| 52 | 641424 |
| 53 | 641671 |
| 54 | 664162 |
| 55 | 664261 |
[1,2,4,11,12,21,26,42,46,121,162,276,421,474,642, 1474,1621,1662,2162,2174,4174,4761,4762,4771,6424, 6642,11142,16662,21621,24724,26724,27224,46121, 47662,64162,64224,66424,161761,161776,166662, 211462,214762,266771,267671,414261,421262,421621, 462776,471462,471642,477224,641424,641671,664162, 664261] |