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| n | a(n) |
|---|---|
| 1 | 21 |
| 2 | 42 |
| 3 | 63 |
| 4 | 14 |
| 5 | 35 |
| 6 | 56 |
| 7 | 7 |
| 8 | 28 |
| 9 | 49 |
| 10 | 210 |
| 11 | 511 |
| 12 | 112 |
| 13 | 413 |
| 14 | 714 |
| 15 | 315 |
| 16 | 616 |
| 17 | 217 |
| 18 | 518 |
| 19 | 119 |
| 20 | 420 |
| 21 | 721 |
| 22 | 322 |
| 23 | 623 |
| 24 | 224 |
| 25 | 525 |
| 26 | 126 |
| 27 | 427 |
| 28 | 728 |
| 29 | 329 |
| 30 | 630 |
| 31 | 231 |
| 32 | 532 |
| 33 | 133 |
| 34 | 434 |
| 35 | 735 |
| 36 | 336 |
| 37 | 637 |
| 38 | 238 |
| 39 | 539 |
| 40 | 140 |
| 41 | 441 |
| 42 | 742 |
| 43 | 343 |
| 44 | 644 |
| 45 | 245 |
| 46 | 546 |
| 47 | 147 |
| 48 | 448 |
| 49 | 749 |
| 50 | 350 |
| 51 | 651 |
| 52 | 252 |
| 53 | 553 |
| 54 | 154 |
[21,42,63,14,35,56,7,28,49,210,511,112,413,714, 315,616,217,518,119,420,721,322,623,224,525,126, 427,728,329,630,231,532,133,434,735,336,637,238, 539,140,441,742,343,644,245,546,147,448,749,350, 651,252,553,154] |