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| n | a(n) |
|---|---|
| 1 | 7 |
| 2 | 17 |
| 3 | 37 |
| 4 | 79 |
| 5 | 165 |
| 6 | 339 |
| 7 | 693 |
| 8 | 1403 |
| 9 | 2837 |
| 10 | 5707 |
| 11 | 11477 |
| 12 | 23019 |
| 13 | 46165 |
| 14 | 92459 |
| 15 | 185173 |
| 16 | 370603 |
| 17 | 741717 |
| 18 | 1483947 |
| 19 | 2968917 |
| 20 | 5938859 |
| 21 | 11879765 |
| 22 | 23761579 |
| 23 | 47527253 |
| 24 | 95058603 |
| 25 | 190125397 |
| 26 | 380258987 |
| 27 | 760534357 |
| 28 | 1521085099 |
| 29 | 3042202965 |
| 30 | 6084438699 |
[7,17,37,79,165,339,693,1403,2837,5707,11477, 23019,46165,92459,185173,370603,741717,1483947, 2968917,5938859,11879765,23761579,47527253, 95058603,190125397,380258987,760534357,1521085099, 3042202965,6084438699] |