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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 15 |
| 3 | 58 |
| 4 | 126 |
| 5 | 475 |
| 6 | 1006 |
| 7 | 2036 |
| 8 | 4093 |
| 9 | 16006 |
| 10 | 32584 |
| 11 | 65402 |
| 12 | 130934 |
| 13 | 262095 |
| 14 | 524251 |
| 15 | 1048554 |
| 16 | 2097148 |
[2,15,58,126,475,1006,2036,4093,16006,32584,65402, 130934,262095,524251,1048554,2097148] |