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| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 6 |
| 3 | 13 |
| 4 | 14 |
| 5 | 15 |
| 6 | 74 |
| 7 | 190 |
| 8 | 688 |
| 9 | 690 |
| 10 | 6456 |
| 11 | 40082 |
| 12 | 251735 |
| 13 | 251736 |
| 14 | 251738 |
| 15 | 399916 |
| 16 | 637325 |
| 17 | 637326 |
| 18 | 637342 |
| 19 | 637343 |
| 20 | 2582372 |
| 21 | 2582434 |
| 22 | 4124456 |
| 23 | 4124458 |
| 24 | 6592686 |
| 25 | 10553425 |
| 26 | 10553433 |
| 27 | 10553818 |
| 28 | 27067038 |
| 29 | 27067053 |
| 30 | 43435902 |
| 31 | 69709872 |
| 32 | 69709877 |
| 33 | 69709945 |
| 34 | 69709954 |
| 35 | 179992917 |
[4,6,13,14,15,74,190,688,690,6456,40082,251735, 251736,251738,399916,637325,637326,637342,637343, 2582372,2582434,4124456,4124458,6592686,10553425, 10553433,10553818,27067038,27067053,43435902, 69709872,69709877,69709945,69709954,179992917] |