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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 212 |
| 3 | 333 |
| 4 | 464 |
| 5 | 525 |
| 6 | 6156 |
| 7 | 7007 |
| 8 | 8128 |
| 9 | 9639 |
| 10 | 0 |
| 11 | 11011 |
| 12 | 122112 |
| 13 | 13013 |
| 14 | 0 |
| 15 | 0 |
| 16 | 162816 |
| 17 | 1720417 |
| 18 | 0 |
| 19 | 1905719 |
| 20 | 0 |
| 21 | 212121 |
| 22 | 0 |
| 23 | 2320723 |
| 24 | 244224 |
| 25 | 25625 |
| 26 | 0 |
| 27 | 2743227 |
| 28 | 287728 |
| 29 | 2917429 |
| 30 | 0 |
| 31 | 3143431 |
| 32 | 325632 |
| 33 | 3372633 |
| 34 | 0 |
| 35 | 0 |
| 36 | 3617136 |
| 37 | 373737 |
| 38 | 0 |
| 39 | 393939 |
| 40 | 0 |
| 41 | 4136941 |
[1,212,333,464,525,6156,7007,8128,9639,0,11011, 122112,13013,0,0,162816,1720417,0,1905719,0, 212121,0,2320723,244224,25625,0,2743227,287728, 2917429,0,3143431,325632,3372633,0,0,3617136, 373737,0,393939,0,4136941] |