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| n | a(n) |
|---|---|
| 1 | 8 |
| 2 | 22 |
| 3 | 46 |
| 4 | 100 |
| 5 | 204 |
| 6 | 422 |
| 7 | 856 |
| 8 | 1744 |
| 9 | 3526 |
| 10 | 7136 |
| 11 | 14388 |
| 12 | 29006 |
| 13 | 58352 |
| 14 | 117336 |
| 15 | 235638 |
| 16 | 473000 |
| 17 | 948684 |
| 18 | 1902030 |
| 19 | 3811400 |
| 20 | 7635312 |
| 21 | 15290470 |
| 22 | 30614320 |
| 23 | 61281860 |
| 24 | 122652366 |
| 25 | 245446592 |
| 26 | 491127784 |
| 27 | 982632022 |
| 28 | 1965883288 |
| 29 | 3932762268 |
[8,22,46,100,204,422,856,1744,3526,7136,14388, 29006,58352,117336,235638,473000,948684,1902030, 3811400,7635312,15290470,30614320,61281860, 122652366,245446592,491127784,982632022, 1965883288,3932762268] |