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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 3 |
| 3 | 4 |
| 4 | 9 |
| 5 | 12 |
| 6 | 19 |
| 7 | 48 |
| 8 | 54 |
| 9 | 90 |
| 10 | 97 |
| 11 | 104 |
| 12 | 174 |
| 13 | 349 |
| 14 | 385 |
| 15 | 1020 |
| 16 | 1294 |
| 17 | 1737 |
| 18 | 2430 |
| 19 | 9040 |
| 20 | 14173 |
| 21 | 15604 |
| 22 | 17943 |
| 23 | 37447 |
| 24 | 149803 |
| 25 | 164043 |
[2,3,4,9,12,19,48,54,90,97,104,174,349,385,1020, 1294,1737,2430,9040,14173,15604,17943,37447, 149803,164043] |