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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 7 |
| 4 | 17 |
| 5 | 37 |
| 6 | 79 |
| 7 | 163 |
| 8 | 321 |
| 9 | 617 |
| 10 | 1179 |
| 11 | 2047 |
| 12 | 3761 |
| 13 | 6773 |
| 14 | 12103 |
| 15 | 20723 |
| 16 | 36733 |
| 17 | 62881 |
| 18 | 110231 |
| 19 | 186379 |
[1,3,7,17,37,79,163,321,617,1179,2047,3761,6773, 12103,20723,36733,62881,110231,186379] |