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| n | a(n) |
|---|---|
| 0 | 2 |
| 1 | 3 |
| 2 | 5 |
| 3 | 7 |
| 4 | 12 |
| 5 | 19 |
| 6 | 31 |
| 7 | 46 |
| 8 | 53 |
| 9 | 72 |
| 10 | 270 |
| 11 | 311 |
| 12 | 954 |
| 13 | 1178 |
| 14 | 1308 |
| 15 | 1395 |
| 16 | 1578 |
| 17 | 3395 |
| 18 | 4190 |
[2,3,5,7,12,19,31,46,53,72,270,311,954,1178,1308, 1395,1578,3395,4190] |