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| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 7 |
| 3 | 9 |
| 4 | 61 |
| 5 | 73 |
| 6 | 81 |
| 7 | 121 |
| 8 | 144 |
| 9 | 431 |
| 10 | 727 |
| 11 | 919 |
| 12 | 1596 |
| 13 | 2413 |
| 14 | 2593 |
| 15 | 2809 |
| 16 | 3966 |
| 17 | 6561 |
| 18 | 6827 |
| 19 | 9551 |
| 20 | 10593 |
| 21 | 12791 |
| 22 | 17053 |
| 23 | 29959 |
| 24 | 31238 |
| 25 | 33791 |
| 26 | 45115 |
| 27 | 47051 |
| 28 | 76157 |
| 29 | 79898 |
| 30 | 85607 |
| 31 | 140891 |
| 32 | 148151 |
| 33 | 192887 |
| 34 | 203843 |
| 35 | 212461 |
| 36 | 311293 |
| 37 | 381739 |
| 38 | 397259 |
[4,7,9,61,73,81,121,144,431,727,919,1596,2413, 2593,2809,3966,6561,6827,9551,10593,12791,17053, 29959,31238,33791,45115,47051,76157,79898,85607, 140891,148151,192887,203843,212461,311293,381739, 397259] |