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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 3 |
| 3 | 4 |
| 4 | 5 |
| 5 | 6 |
| 6 | 8 |
| 7 | 18 |
| 8 | 53 |
| 9 | 94 |
| 10 | 97 |
| 11 | 98 |
| 12 | 106 |
| 13 | 132 |
| 14 | 148 |
| 15 | 150 |
| 16 | 153 |
| 17 | 155 |
| 18 | 165 |
| 19 | 204 |
| 20 | 312 |
[2,3,4,5,6,8,18,53,94,97,98,106,132,148,150,153, 155,165,204,312] |