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| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 6 |
| 3 | 7 |
| 4 | 14 |
| 5 | 19 |
| 6 | 31 |
| 7 | 34 |
| 8 | 66 |
| 9 | 93 |
| 10 | 307 |
| 11 | 402 |
| 12 | 421 |
| 13 | 600 |
| 14 | 848 |
| 15 | 1022 |
| 16 | 1057 |
| 17 | 1906 |
| 18 | 3772 |
| 19 | 4184 |
| 20 | 4364 |
[3,6,7,14,19,31,34,66,93,307,402,421,600,848,1022, 1057,1906,3772,4184,4364] |